Home / 90,020.43-134,998.25-30,840.21

Finding the Fourth Proportional to 90,020.43, 134,998.25 and 30,840.21

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Solution

The fourth proportional to 90,020.43, 134,998.25 and 30,840.21 is: 46,249.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,020.43 : 134,998.25 = 30,840.21 : x
  2. Step 2: Convert to fraction form
    90,020.43/134,998.25 = 30,840.21/x
  3. Step 3: Cross multiply
    90,020.43x = 134,998.25 × 30,840.21
  4. Step 4: Simplify right side
    90,020.43x = 4,163,374,225.43
  5. Step 5: Solve for x
    x = 4,163,374,225.43/90,020.43
  6. Step 6: Final answer
    x = 46,249.22

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Half scale
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Double scale
Find fourth proportional to 90,021.43, 134,999.74 and 30,841.21
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.