Home / 129,025.12-178,073.04-72,440.32

Finding the Fourth Proportional to 129,025.12, 178,073.04 and 72,440.32

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Solution

The fourth proportional to 129,025.12, 178,073.04 and 72,440.32 is: 99,977.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,025.12 : 178,073.04 = 72,440.32 : x
  2. Step 2: Convert to fraction form
    129,025.12/178,073.04 = 72,440.32/x
  3. Step 3: Cross multiply
    129,025.12x = 178,073.04 × 72,440.32
  4. Step 4: Simplify right side
    129,025.12x = 12,899,668,000.97
  5. Step 5: Solve for x
    x = 12,899,668,000.97/129,025.12
  6. Step 6: Final answer
    x = 99,977.96

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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.