Home / 129,742.26-178,890.92-91,508.10

Finding the Fourth Proportional to 129,742.26, 178,890.92 and 91,508.10

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Solution

The fourth proportional to 129,742.26, 178,890.92 and 91,508.10 is: 126,172.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,742.26 : 178,890.92 = 91,508.10 : x
  2. Step 2: Convert to fraction form
    129,742.26/178,890.92 = 91,508.10/x
  3. Step 3: Cross multiply
    129,742.26x = 178,890.92 × 91,508.10
  4. Step 4: Simplify right side
    129,742.26x = 16,369,968,196.45
  5. Step 5: Solve for x
    x = 16,369,968,196.45/129,742.26
  6. Step 6: Final answer
    x = 126,172.98

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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.