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Finding the Fourth Proportional to 90,614.70, 135,792.45 and 66,735.90

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Solution

The fourth proportional to 90,614.70, 135,792.45 and 66,735.90 is: 100,008.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,614.70 : 135,792.45 = 66,735.90 : x
  2. Step 2: Convert to fraction form
    90,614.70/135,792.45 = 66,735.90/x
  3. Step 3: Cross multiply
    90,614.70x = 135,792.45 × 66,735.90
  4. Step 4: Simplify right side
    90,614.70x = 9,062,231,363.96
  5. Step 5: Solve for x
    x = 9,062,231,363.96/90,614.70
  6. Step 6: Final answer
    x = 100,008.40

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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.