Home / 129,078.44-178,117.11-71,716.72

Finding the Fourth Proportional to 129,078.44, 178,117.11 and 71,716.72

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Solution

The fourth proportional to 129,078.44, 178,117.11 and 71,716.72 is: 98,962.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,078.44 : 178,117.11 = 71,716.72 : x
  2. Step 2: Convert to fraction form
    129,078.44/178,117.11 = 71,716.72/x
  3. Step 3: Cross multiply
    129,078.44x = 178,117.11 × 71,716.72
  4. Step 4: Simplify right side
    129,078.44x = 12,773,974,459.79
  5. Step 5: Solve for x
    x = 12,773,974,459.79/129,078.44
  6. Step 6: Final answer
    x = 98,962.88

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1.5x scale

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.