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Finding the Fourth Proportional to 82,800.30, 124,200.45 and 72,958.80

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Solution

The fourth proportional to 82,800.30, 124,200.45 and 72,958.80 is: 109,438.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,800.30 : 124,200.45 = 72,958.80 : x
  2. Step 2: Convert to fraction form
    82,800.30/124,200.45 = 72,958.80/x
  3. Step 3: Cross multiply
    82,800.30x = 124,200.45 × 72,958.80
  4. Step 4: Simplify right side
    82,800.30x = 9,061,515,791.46
  5. Step 5: Solve for x
    x = 9,061,515,791.46/82,800.30
  6. Step 6: Final answer
    x = 109,438.20

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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.