Home / 90,840.13-136,265.05-28,515.49

Finding the Fourth Proportional to 90,840.13, 136,265.05 and 28,515.49

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Solution

The fourth proportional to 90,840.13, 136,265.05 and 28,515.49 is: 42,774.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,840.13 : 136,265.05 = 28,515.49 : x
  2. Step 2: Convert to fraction form
    90,840.13/136,265.05 = 28,515.49/x
  3. Step 3: Cross multiply
    90,840.13x = 136,265.05 × 28,515.49
  4. Step 4: Simplify right side
    90,840.13x = 3,885,664,670.62
  5. Step 5: Solve for x
    x = 3,885,664,670.62/90,840.13
  6. Step 6: Final answer
    x = 42,774.76

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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.