Home / 129,044.85-178,146.64-80,673.65

Finding the Fourth Proportional to 129,044.85, 178,146.64 and 80,673.65

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Solution

The fourth proportional to 129,044.85, 178,146.64 and 80,673.65 is: 111,370.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,044.85 : 178,146.64 = 80,673.65 : x
  2. Step 2: Convert to fraction form
    129,044.85/178,146.64 = 80,673.65/x
  3. Step 3: Cross multiply
    129,044.85x = 178,146.64 × 80,673.65
  4. Step 4: Simplify right side
    129,044.85x = 14,371,739,061.16
  5. Step 5: Solve for x
    x = 14,371,739,061.16/129,044.85
  6. Step 6: Final answer
    x = 111,370.11

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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.