Home / 129,242.24-178,363.68-78,950.72

Finding the Fourth Proportional to 129,242.24, 178,363.68 and 78,950.72

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Solution

The fourth proportional to 129,242.24, 178,363.68 and 78,950.72 is: 108,957.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,242.24 : 178,363.68 = 78,950.72 : x
  2. Step 2: Convert to fraction form
    129,242.24/178,363.68 = 78,950.72/x
  3. Step 3: Cross multiply
    129,242.24x = 178,363.68 × 78,950.72
  4. Step 4: Simplify right side
    129,242.24x = 14,081,940,957.85
  5. Step 5: Solve for x
    x = 14,081,940,957.85/129,242.24
  6. Step 6: Final answer
    x = 108,957.73

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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.