Home / 129,434.20-178,631.26-75,715.80

Finding the Fourth Proportional to 129,434.20, 178,631.26 and 75,715.80

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Solution

The fourth proportional to 129,434.20, 178,631.26 and 75,715.80 is: 104,494.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,434.20 : 178,631.26 = 75,715.80 : x
  2. Step 2: Convert to fraction form
    129,434.20/178,631.26 = 75,715.80/x
  3. Step 3: Cross multiply
    129,434.20x = 178,631.26 × 75,715.80
  4. Step 4: Simplify right side
    129,434.20x = 13,525,208,755.91
  5. Step 5: Solve for x
    x = 13,525,208,755.91/129,434.20
  6. Step 6: Final answer
    x = 104,494.86

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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.