Home / 129,083.27-178,134.34-71,731.93

Finding the Fourth Proportional to 129,083.27, 178,134.34 and 71,731.93

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Solution

The fourth proportional to 129,083.27, 178,134.34 and 71,731.93 is: 98,989.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,083.27 : 178,134.34 = 71,731.93 : x
  2. Step 2: Convert to fraction form
    129,083.27/178,134.34 = 71,731.93/x
  3. Step 3: Cross multiply
    129,083.27x = 178,134.34 × 71,731.93
  4. Step 4: Simplify right side
    129,083.27x = 12,777,919,851.31
  5. Step 5: Solve for x
    x = 12,777,919,851.31/129,083.27
  6. Step 6: Final answer
    x = 98,989.74

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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.