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Finding the Fourth Proportional to 81,798.53, 122,694.14 and 28,502.60

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Solution

The fourth proportional to 81,798.53, 122,694.14 and 28,502.60 is: 42,752.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,798.53 : 122,694.14 = 28,502.60 : x
  2. Step 2: Convert to fraction form
    81,798.53/122,694.14 = 28,502.60/x
  3. Step 3: Cross multiply
    81,798.53x = 122,694.14 × 28,502.60
  4. Step 4: Simplify right side
    81,798.53x = 3,497,101,452.55
  5. Step 5: Solve for x
    x = 3,497,101,452.55/81,798.53
  6. Step 6: Final answer
    x = 42,752.62

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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.