Home / 129,426.24-178,074-101,082.72

Finding the Fourth Proportional to 129,426.24, 178,074 and 101,082.72

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Solution

The fourth proportional to 129,426.24, 178,074 and 101,082.72 is: 139,076.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,426.24 : 178,074 = 101,082.72 : x
  2. Step 2: Convert to fraction form
    129,426.24/178,074 = 101,082.72/x
  3. Step 3: Cross multiply
    129,426.24x = 178,074 × 101,082.72
  4. Step 4: Simplify right side
    129,426.24x = 18,000,204,281.28
  5. Step 5: Solve for x
    x = 18,000,204,281.28/129,426.24
  6. Step 6: Final answer
    x = 139,076.93

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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.