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Finding the Fourth Proportional to 128,414.84, 177,217.67 and 71,053.20

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Solution

The fourth proportional to 128,414.84, 177,217.67 and 71,053.20 is: 98,056.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,414.84 : 177,217.67 = 71,053.20 : x
  2. Step 2: Convert to fraction form
    128,414.84/177,217.67 = 71,053.20/x
  3. Step 3: Cross multiply
    128,414.84x = 177,217.67 × 71,053.20
  4. Step 4: Simplify right side
    128,414.84x = 12,591,882,727.68
  5. Step 5: Solve for x
    x = 12,591,882,727.68/128,414.84
  6. Step 6: Final answer
    x = 98,056.29

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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.