Home / 129,052.43-178,120.79-71,711.42

Finding the Fourth Proportional to 129,052.43, 178,120.79 and 71,711.42

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Solution

The fourth proportional to 129,052.43, 178,120.79 and 71,711.42 is: 98,977.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,052.43 : 178,120.79 = 71,711.42 : x
  2. Step 2: Convert to fraction form
    129,052.43/178,120.79 = 71,711.42/x
  3. Step 3: Cross multiply
    129,052.43x = 178,120.79 × 71,711.42
  4. Step 4: Simplify right side
    129,052.43x = 12,773,293,533.26
  5. Step 5: Solve for x
    x = 12,773,293,533.26/129,052.43
  6. Step 6: Final answer
    x = 98,977.56

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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.