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Finding the Fourth Proportional to 125,254.66, 172,869.89 and 79,318.49

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Solution

The fourth proportional to 125,254.66, 172,869.89 and 79,318.49 is: 109,471.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,254.66 : 172,869.89 = 79,318.49 : x
  2. Step 2: Convert to fraction form
    125,254.66/172,869.89 = 79,318.49/x
  3. Step 3: Cross multiply
    125,254.66x = 172,869.89 × 79,318.49
  4. Step 4: Simplify right side
    125,254.66x = 13,711,779,271.74
  5. Step 5: Solve for x
    x = 13,711,779,271.74/125,254.66
  6. Step 6: Final answer
    x = 109,471.21

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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.