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Finding the Fourth Proportional to 82,758.80, 124,397.40 and 81,203.60

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Solution

The fourth proportional to 82,758.80, 124,397.40 and 81,203.60 is: 122,059.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,758.80 : 124,397.40 = 81,203.60 : x
  2. Step 2: Convert to fraction form
    82,758.80/124,397.40 = 81,203.60/x
  3. Step 3: Cross multiply
    82,758.80x = 124,397.40 × 81,203.60
  4. Step 4: Simplify right side
    82,758.80x = 10,101,516,710.64
  5. Step 5: Solve for x
    x = 10,101,516,710.64/82,758.80
  6. Step 6: Final answer
    x = 122,059.73

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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.