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Finding the Fourth Proportional to 73,139.18, 100,932.03 and 39,605.18

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Solution

The fourth proportional to 73,139.18, 100,932.03 and 39,605.18 is: 54,655.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,139.18 : 100,932.03 = 39,605.18 : x
  2. Step 2: Convert to fraction form
    73,139.18/100,932.03 = 39,605.18/x
  3. Step 3: Cross multiply
    73,139.18x = 100,932.03 × 39,605.18
  4. Step 4: Simplify right side
    73,139.18x = 3,997,430,711.26
  5. Step 5: Solve for x
    x = 3,997,430,711.26/73,139.18
  6. Step 6: Final answer
    x = 54,655.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.