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Finding the Fourth Proportional to 66,379.94, 99,569.92 and 38,658.50

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Solution

The fourth proportional to 66,379.94, 99,569.92 and 38,658.50 is: 57,987.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,379.94 : 99,569.92 = 38,658.50 : x
  2. Step 2: Convert to fraction form
    66,379.94/99,569.92 = 38,658.50/x
  3. Step 3: Cross multiply
    66,379.94x = 99,569.92 × 38,658.50
  4. Step 4: Simplify right side
    66,379.94x = 3,849,223,752.32
  5. Step 5: Solve for x
    x = 3,849,223,752.32/66,379.94
  6. Step 6: Final answer
    x = 57,987.76

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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.