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Finding the Fourth Proportional to 71,389.80, 107,011.80 and 41,792.40

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Solution

The fourth proportional to 71,389.80, 107,011.80 and 41,792.40 is: 62,645.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,389.80 : 107,011.80 = 41,792.40 : x
  2. Step 2: Convert to fraction form
    71,389.80/107,011.80 = 41,792.40/x
  3. Step 3: Cross multiply
    71,389.80x = 107,011.80 × 41,792.40
  4. Step 4: Simplify right side
    71,389.80x = 4,472,279,950.32
  5. Step 5: Solve for x
    x = 4,472,279,950.32/71,389.80
  6. Step 6: Final answer
    x = 62,645.92

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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.