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Finding the Fourth Proportional to 125,253.91, 172,868.86 and 79,317.74

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Solution

The fourth proportional to 125,253.91, 172,868.86 and 79,317.74 is: 109,470.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,253.91 : 172,868.86 = 79,317.74 : x
  2. Step 2: Convert to fraction form
    125,253.91/172,868.86 = 79,317.74/x
  3. Step 3: Cross multiply
    125,253.91x = 172,868.86 × 79,317.74
  4. Step 4: Simplify right side
    125,253.91x = 13,711,567,525.45
  5. Step 5: Solve for x
    x = 13,711,567,525.45/125,253.91
  6. Step 6: Final answer
    x = 109,470.18

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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.