Home / 129,052.31-178,120.62-71,711.33

Finding the Fourth Proportional to 129,052.31, 178,120.62 and 71,711.33

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Solution

The fourth proportional to 129,052.31, 178,120.62 and 71,711.33 is: 98,977.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,052.31 : 178,120.62 = 71,711.33 : x
  2. Step 2: Convert to fraction form
    129,052.31/178,120.62 = 71,711.33/x
  3. Step 3: Cross multiply
    129,052.31x = 178,120.62 × 71,711.33
  4. Step 4: Simplify right side
    129,052.31x = 12,773,265,670.02
  5. Step 5: Solve for x
    x = 12,773,265,670.02/129,052.31
  6. Step 6: Final answer
    x = 98,977.43

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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.