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Finding the Fourth Proportional to 128,301.88, 177,060.46 and 71,711.80

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Solution

The fourth proportional to 128,301.88, 177,060.46 and 71,711.80 is: 98,964.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,301.88 : 177,060.46 = 71,711.80 : x
  2. Step 2: Convert to fraction form
    128,301.88/177,060.46 = 71,711.80/x
  3. Step 3: Cross multiply
    128,301.88x = 177,060.46 × 71,711.80
  4. Step 4: Simplify right side
    128,301.88x = 12,697,324,295.43
  5. Step 5: Solve for x
    x = 12,697,324,295.43/128,301.88
  6. Step 6: Final answer
    x = 98,964.44

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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.