Home / 129,267.38-178,391.21-71,911.28

Finding the Fourth Proportional to 129,267.38, 178,391.21 and 71,911.28

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Solution

The fourth proportional to 129,267.38, 178,391.21 and 71,911.28 is: 99,238.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,267.38 : 178,391.21 = 71,911.28 : x
  2. Step 2: Convert to fraction form
    129,267.38/178,391.21 = 71,911.28/x
  3. Step 3: Cross multiply
    129,267.38x = 178,391.21 × 71,911.28
  4. Step 4: Simplify right side
    129,267.38x = 12,828,339,000.34
  5. Step 5: Solve for x
    x = 12,828,339,000.34/129,267.38
  6. Step 6: Final answer
    x = 99,238.80

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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.