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Finding the Fourth Proportional to 125,171.20, 187,810.80 and 72,625.60

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Solution

The fourth proportional to 125,171.20, 187,810.80 and 72,625.60 is: 108,969.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,171.20 : 187,810.80 = 72,625.60 : x
  2. Step 2: Convert to fraction form
    125,171.20/187,810.80 = 72,625.60/x
  3. Step 3: Cross multiply
    125,171.20x = 187,810.80 × 72,625.60
  4. Step 4: Simplify right side
    125,171.20x = 13,639,872,036.48
  5. Step 5: Solve for x
    x = 13,639,872,036.48/125,171.20
  6. Step 6: Final answer
    x = 108,969.73

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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.