Home / 129,307.38-178,444.18-72,718.75

Finding the Fourth Proportional to 129,307.38, 178,444.18 and 72,718.75

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Solution

The fourth proportional to 129,307.38, 178,444.18 and 72,718.75 is: 100,351.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,307.38 : 178,444.18 = 72,718.75 : x
  2. Step 2: Convert to fraction form
    129,307.38/178,444.18 = 72,718.75/x
  3. Step 3: Cross multiply
    129,307.38x = 178,444.18 × 72,718.75
  4. Step 4: Simplify right side
    129,307.38x = 12,976,237,714.38
  5. Step 5: Solve for x
    x = 12,976,237,714.38/129,307.38
  6. Step 6: Final answer
    x = 100,351.87

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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.