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Finding the Fourth Proportional to 125,338.32, 172,989 and 74,379.14

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Solution

The fourth proportional to 125,338.32, 172,989 and 74,379.14 is: 102,656.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,338.32 : 172,989 = 74,379.14 : x
  2. Step 2: Convert to fraction form
    125,338.32/172,989 = 74,379.14/x
  3. Step 3: Cross multiply
    125,338.32x = 172,989 × 74,379.14
  4. Step 4: Simplify right side
    125,338.32x = 12,866,773,049.46
  5. Step 5: Solve for x
    x = 12,866,773,049.46/125,338.32
  6. Step 6: Final answer
    x = 102,656.34

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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.