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Finding the Fourth Proportional to 125,388.91, 172,954.79 and 74,363.47

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Solution

The fourth proportional to 125,388.91, 172,954.79 and 74,363.47 is: 102,573.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,388.91 : 172,954.79 = 74,363.47 : x
  2. Step 2: Convert to fraction form
    125,388.91/172,954.79 = 74,363.47/x
  3. Step 3: Cross multiply
    125,388.91x = 172,954.79 × 74,363.47
  4. Step 4: Simplify right side
    125,388.91x = 12,861,518,230.47
  5. Step 5: Solve for x
    x = 12,861,518,230.47/125,388.91
  6. Step 6: Final answer
    x = 102,573.01

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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.