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Finding the Fourth Proportional to 102,060.80, 140,912.64 and 91,272.20

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Solution

The fourth proportional to 102,060.80, 140,912.64 and 91,272.20 is: 126,017.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,060.80 : 140,912.64 = 91,272.20 : x
  2. Step 2: Convert to fraction form
    102,060.80/140,912.64 = 91,272.20/x
  3. Step 3: Cross multiply
    102,060.80x = 140,912.64 × 91,272.20
  4. Step 4: Simplify right side
    102,060.80x = 12,861,406,660.61
  5. Step 5: Solve for x
    x = 12,861,406,660.61/102,060.80
  6. Step 6: Final answer
    x = 126,017.11

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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.