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Finding the Fourth Proportional to 71,590.87, 107,386.17 and 39,995.47

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Solution

The fourth proportional to 71,590.87, 107,386.17 and 39,995.47 is: 59,993.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,590.87 : 107,386.17 = 39,995.47 : x
  2. Step 2: Convert to fraction form
    71,590.87/107,386.17 = 39,995.47/x
  3. Step 3: Cross multiply
    71,590.87x = 107,386.17 × 39,995.47
  4. Step 4: Simplify right side
    71,590.87x = 4,294,960,340.65
  5. Step 5: Solve for x
    x = 4,294,960,340.65/71,590.87
  6. Step 6: Final answer
    x = 59,993.13

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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.