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Finding the Fourth Proportional to 115,909.90, 173,890.05 and 66,013.90

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Solution

The fourth proportional to 115,909.90, 173,890.05 and 66,013.90 is: 99,035.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,909.90 : 173,890.05 = 66,013.90 : x
  2. Step 2: Convert to fraction form
    115,909.90/173,890.05 = 66,013.90/x
  3. Step 3: Cross multiply
    115,909.90x = 173,890.05 × 66,013.90
  4. Step 4: Simplify right side
    115,909.90x = 11,479,160,371.70
  5. Step 5: Solve for x
    x = 11,479,160,371.70/115,909.90
  6. Step 6: Final answer
    x = 99,035.20

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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.