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Finding the Fourth Proportional to 90,614.40, 135,921.60 and 62,620.80

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Solution

The fourth proportional to 90,614.40, 135,921.60 and 62,620.80 is: 93,931.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,614.40 : 135,921.60 = 62,620.80 : x
  2. Step 2: Convert to fraction form
    90,614.40/135,921.60 = 62,620.80/x
  3. Step 3: Cross multiply
    90,614.40x = 135,921.60 × 62,620.80
  4. Step 4: Simplify right side
    90,614.40x = 8,511,519,329.28
  5. Step 5: Solve for x
    x = 8,511,519,329.28/90,614.40
  6. Step 6: Final answer
    x = 93,931.20

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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.