Home / 129,144.38-178,138.82-88,788.07

Finding the Fourth Proportional to 129,144.38, 178,138.82 and 88,788.07

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Solution

The fourth proportional to 129,144.38, 178,138.82 and 88,788.07 is: 122,472.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,144.38 : 178,138.82 = 88,788.07 : x
  2. Step 2: Convert to fraction form
    129,144.38/178,138.82 = 88,788.07/x
  3. Step 3: Cross multiply
    129,144.38x = 178,138.82 × 88,788.07
  4. Step 4: Simplify right side
    129,144.38x = 15,816,602,715.82
  5. Step 5: Solve for x
    x = 15,816,602,715.82/129,144.38
  6. Step 6: Final answer
    x = 122,472.25

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1.5x scale

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.