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Finding the Fourth Proportional to 111,487.25, 167,229.18 and 77,261.45

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Solution

The fourth proportional to 111,487.25, 167,229.18 and 77,261.45 is: 115,890.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,487.25 : 167,229.18 = 77,261.45 : x
  2. Step 2: Convert to fraction form
    111,487.25/167,229.18 = 77,261.45/x
  3. Step 3: Cross multiply
    111,487.25x = 167,229.18 × 77,261.45
  4. Step 4: Simplify right side
    111,487.25x = 12,920,368,092.97
  5. Step 5: Solve for x
    x = 12,920,368,092.97/111,487.25
  6. Step 6: Final answer
    x = 115,890.99

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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.