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Finding the Fourth Proportional to 100,918.53, 139,257.12 and 62,150.22

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Solution

The fourth proportional to 100,918.53, 139,257.12 and 62,150.22 is: 85,760.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,918.53 : 139,257.12 = 62,150.22 : x
  2. Step 2: Convert to fraction form
    100,918.53/139,257.12 = 62,150.22/x
  3. Step 3: Cross multiply
    100,918.53x = 139,257.12 × 62,150.22
  4. Step 4: Simplify right side
    100,918.53x = 8,654,860,644.57
  5. Step 5: Solve for x
    x = 8,654,860,644.57/100,918.53
  6. Step 6: Final answer
    x = 85,760.87

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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.