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Finding the Fourth Proportional to 125,255.66, 172,871.27 and 79,319.49

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Solution

The fourth proportional to 125,255.66, 172,871.27 and 79,319.49 is: 109,472.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,255.66 : 172,871.27 = 79,319.49 : x
  2. Step 2: Convert to fraction form
    125,255.66/172,871.27 = 79,319.49/x
  3. Step 3: Cross multiply
    125,255.66x = 172,871.27 × 79,319.49
  4. Step 4: Simplify right side
    125,255.66x = 13,712,060,972.05
  5. Step 5: Solve for x
    x = 13,712,060,972.05/125,255.66
  6. Step 6: Final answer
    x = 109,472.59

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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.