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Finding the Fourth Proportional to 81,149.66, 121,787.28 and 53,062.10

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Solution

The fourth proportional to 81,149.66, 121,787.28 and 53,062.10 is: 79,634.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,149.66 : 121,787.28 = 53,062.10 : x
  2. Step 2: Convert to fraction form
    81,149.66/121,787.28 = 53,062.10/x
  3. Step 3: Cross multiply
    81,149.66x = 121,787.28 × 53,062.10
  4. Step 4: Simplify right side
    81,149.66x = 6,462,288,830.09
  5. Step 5: Solve for x
    x = 6,462,288,830.09/81,149.66
  6. Step 6: Final answer
    x = 79,634.21

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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.