Home / 129,037.92-178,072.20-72,449.52

Finding the Fourth Proportional to 129,037.92, 178,072.20 and 72,449.52

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Solution

The fourth proportional to 129,037.92, 178,072.20 and 72,449.52 is: 99,980.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,037.92 : 178,072.20 = 72,449.52 : x
  2. Step 2: Convert to fraction form
    129,037.92/178,072.20 = 72,449.52/x
  3. Step 3: Cross multiply
    129,037.92x = 178,072.20 × 72,449.52
  4. Step 4: Simplify right side
    129,037.92x = 12,901,245,415.34
  5. Step 5: Solve for x
    x = 12,901,245,415.34/129,037.92
  6. Step 6: Final answer
    x = 99,980.26

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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.