Home / 129,265.88-178,389.14-71,909.78

Finding the Fourth Proportional to 129,265.88, 178,389.14 and 71,909.78

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Solution

The fourth proportional to 129,265.88, 178,389.14 and 71,909.78 is: 99,236.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,265.88 : 178,389.14 = 71,909.78 : x
  2. Step 2: Convert to fraction form
    129,265.88/178,389.14 = 71,909.78/x
  3. Step 3: Cross multiply
    129,265.88x = 178,389.14 × 71,909.78
  4. Step 4: Simplify right side
    129,265.88x = 12,827,922,560.29
  5. Step 5: Solve for x
    x = 12,827,922,560.29/129,265.88
  6. Step 6: Final answer
    x = 99,236.73

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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.