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Finding the Fourth Proportional to 129,374.52, 178,471.52 and 75,624.42

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Solution

The fourth proportional to 129,374.52, 178,471.52 and 75,624.42 is: 104,323.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,374.52 : 178,471.52 = 75,624.42 : x
  2. Step 2: Convert to fraction form
    129,374.52/178,471.52 = 75,624.42/x
  3. Step 3: Cross multiply
    129,374.52x = 178,471.52 × 75,624.42
  4. Step 4: Simplify right side
    129,374.52x = 13,496,804,808.40
  5. Step 5: Solve for x
    x = 13,496,804,808.40/129,374.52
  6. Step 6: Final answer
    x = 104,323.52

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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.