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Finding the Fourth Proportional to 99,520.65, 137,329.46 and 59,227.91

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Solution

The fourth proportional to 99,520.65, 137,329.46 and 59,227.91 is: 81,729.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,520.65 : 137,329.46 = 59,227.91 : x
  2. Step 2: Convert to fraction form
    99,520.65/137,329.46 = 59,227.91/x
  3. Step 3: Cross multiply
    99,520.65x = 137,329.46 × 59,227.91
  4. Step 4: Simplify right side
    99,520.65x = 8,133,736,651.53
  5. Step 5: Solve for x
    x = 8,133,736,651.53/99,520.65
  6. Step 6: Final answer
    x = 81,729.14

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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.