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Finding the Fourth Proportional to 138,355.79, 207,513.02 and 38,505.57

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Solution

The fourth proportional to 138,355.79, 207,513.02 and 38,505.57 is: 57,752.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,355.79 : 207,513.02 = 38,505.57 : x
  2. Step 2: Convert to fraction form
    138,355.79/207,513.02 = 38,505.57/x
  3. Step 3: Cross multiply
    138,355.79x = 207,513.02 × 38,505.57
  4. Step 4: Simplify right side
    138,355.79x = 7,990,406,924.99
  5. Step 5: Solve for x
    x = 7,990,406,924.99/138,355.79
  6. Step 6: Final answer
    x = 57,752.60

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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.