Home / 129,240.84-178,348.89-71,877.19

Finding the Fourth Proportional to 129,240.84, 178,348.89 and 71,877.19

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Solution

The fourth proportional to 129,240.84, 178,348.89 and 71,877.19 is: 99,188.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,240.84 : 178,348.89 = 71,877.19 : x
  2. Step 2: Convert to fraction form
    129,240.84/178,348.89 = 71,877.19/x
  3. Step 3: Cross multiply
    129,240.84x = 178,348.89 × 71,877.19
  4. Step 4: Simplify right side
    129,240.84x = 12,819,217,052.82
  5. Step 5: Solve for x
    x = 12,819,217,052.82/129,240.84
  6. Step 6: Final answer
    x = 99,188.59

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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.