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Finding the Fourth Proportional to 73,139.90, 100,932.48 and 39,605.90

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Solution

The fourth proportional to 73,139.90, 100,932.48 and 39,605.90 is: 54,655.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,139.90 : 100,932.48 = 39,605.90 : x
  2. Step 2: Convert to fraction form
    73,139.90/100,932.48 = 39,605.90/x
  3. Step 3: Cross multiply
    73,139.90x = 100,932.48 × 39,605.90
  4. Step 4: Simplify right side
    73,139.90x = 3,997,521,808.65
  5. Step 5: Solve for x
    x = 3,997,521,808.65/73,139.90
  6. Step 6: Final answer
    x = 54,655.83

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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.