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Finding the Fourth Proportional to 82,042.80, 123,064.20 and 54,000.60

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Solution

The fourth proportional to 82,042.80, 123,064.20 and 54,000.60 is: 81,000.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,042.80 : 123,064.20 = 54,000.60 : x
  2. Step 2: Convert to fraction form
    82,042.80/123,064.20 = 54,000.60/x
  3. Step 3: Cross multiply
    82,042.80x = 123,064.20 × 54,000.60
  4. Step 4: Simplify right side
    82,042.80x = 6,645,540,638.52
  5. Step 5: Solve for x
    x = 6,645,540,638.52/82,042.80
  6. Step 6: Final answer
    x = 81,000.90

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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.