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Finding the Fourth Proportional to 82,451.80, 123,677.70 and 72,602.20

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Solution

The fourth proportional to 82,451.80, 123,677.70 and 72,602.20 is: 108,903.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,451.80 : 123,677.70 = 72,602.20 : x
  2. Step 2: Convert to fraction form
    82,451.80/123,677.70 = 72,602.20/x
  3. Step 3: Cross multiply
    82,451.80x = 123,677.70 × 72,602.20
  4. Step 4: Simplify right side
    82,451.80x = 8,979,273,110.94
  5. Step 5: Solve for x
    x = 8,979,273,110.94/82,451.80
  6. Step 6: Final answer
    x = 108,903.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.