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Finding the Fourth Proportional to 99,808.41, 137,763.41 and 57,380.61

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Solution

The fourth proportional to 99,808.41, 137,763.41 and 57,380.61 is: 79,201.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,808.41 : 137,763.41 = 57,380.61 : x
  2. Step 2: Convert to fraction form
    99,808.41/137,763.41 = 57,380.61/x
  3. Step 3: Cross multiply
    99,808.41x = 137,763.41 × 57,380.61
  4. Step 4: Simplify right side
    99,808.41x = 7,904,948,214.58
  5. Step 5: Solve for x
    x = 7,904,948,214.58/99,808.41
  6. Step 6: Final answer
    x = 79,201.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.