Home / 128,613.17-177,487.41-71,253.71

Finding the Fourth Proportional to 128,613.17, 177,487.41 and 71,253.71

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Solution

The fourth proportional to 128,613.17, 177,487.41 and 71,253.71 is: 98,330.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,613.17 : 177,487.41 = 71,253.71 : x
  2. Step 2: Convert to fraction form
    128,613.17/177,487.41 = 71,253.71/x
  3. Step 3: Cross multiply
    128,613.17x = 177,487.41 × 71,253.71
  4. Step 4: Simplify right side
    128,613.17x = 12,646,635,553.35
  5. Step 5: Solve for x
    x = 12,646,635,553.35/128,613.17
  6. Step 6: Final answer
    x = 98,330.80

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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.