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Finding the Fourth Proportional to 81,160.80, 121,658.40 and 54,868.20

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Solution

The fourth proportional to 81,160.80, 121,658.40 and 54,868.20 is: 82,246.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,160.80 : 121,658.40 = 54,868.20 : x
  2. Step 2: Convert to fraction form
    81,160.80/121,658.40 = 54,868.20/x
  3. Step 3: Cross multiply
    81,160.80x = 121,658.40 × 54,868.20
  4. Step 4: Simplify right side
    81,160.80x = 6,675,177,422.88
  5. Step 5: Solve for x
    x = 6,675,177,422.88/81,160.80
  6. Step 6: Final answer
    x = 82,246.32

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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.