Home / 129,436.26-178,580.34-72,836.70

Finding the Fourth Proportional to 129,436.26, 178,580.34 and 72,836.70

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Solution

The fourth proportional to 129,436.26, 178,580.34 and 72,836.70 is: 100,491.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,436.26 : 178,580.34 = 72,836.70 : x
  2. Step 2: Convert to fraction form
    129,436.26/178,580.34 = 72,836.70/x
  3. Step 3: Cross multiply
    129,436.26x = 178,580.34 × 72,836.70
  4. Step 4: Simplify right side
    129,436.26x = 13,007,202,650.48
  5. Step 5: Solve for x
    x = 13,007,202,650.48/129,436.26
  6. Step 6: Final answer
    x = 100,491.18

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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.