Home / 129,608.28-178,861.38-72,246

Finding the Fourth Proportional to 129,608.28, 178,861.38 and 72,246

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Solution

The fourth proportional to 129,608.28, 178,861.38 and 72,246 is: 99,700.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,608.28 : 178,861.38 = 72,246 : x
  2. Step 2: Convert to fraction form
    129,608.28/178,861.38 = 72,246/x
  3. Step 3: Cross multiply
    129,608.28x = 178,861.38 × 72,246
  4. Step 4: Simplify right side
    129,608.28x = 12,922,019,259.48
  5. Step 5: Solve for x
    x = 12,922,019,259.48/129,608.28
  6. Step 6: Final answer
    x = 99,700.57

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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.