Home / 90,029.78-135,030.50-56,647.66

Finding the Fourth Proportional to 90,029.78, 135,030.50 and 56,647.66

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Solution

The fourth proportional to 90,029.78, 135,030.50 and 56,647.66 is: 84,962.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,029.78 : 135,030.50 = 56,647.66 : x
  2. Step 2: Convert to fraction form
    90,029.78/135,030.50 = 56,647.66/x
  3. Step 3: Cross multiply
    90,029.78x = 135,030.50 × 56,647.66
  4. Step 4: Simplify right side
    90,029.78x = 7,649,161,853.63
  5. Step 5: Solve for x
    x = 7,649,161,853.63/90,029.78
  6. Step 6: Final answer
    x = 84,962.57

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Double scale
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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.