Home / 129,915.09-179,279.34-72,552.83

Finding the Fourth Proportional to 129,915.09, 179,279.34 and 72,552.83

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Solution

The fourth proportional to 129,915.09, 179,279.34 and 72,552.83 is: 100,120.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,915.09 : 179,279.34 = 72,552.83 : x
  2. Step 2: Convert to fraction form
    129,915.09/179,279.34 = 72,552.83/x
  3. Step 3: Cross multiply
    129,915.09x = 179,279.34 × 72,552.83
  4. Step 4: Simplify right side
    129,915.09x = 13,007,222,581.14
  5. Step 5: Solve for x
    x = 13,007,222,581.14/129,915.09
  6. Step 6: Final answer
    x = 100,120.95

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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.