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Finding the Fourth Proportional to 99,327.54, 136,978.02 and 63,455.28

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Solution

The fourth proportional to 99,327.54, 136,978.02 and 63,455.28 is: 87,508.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,327.54 : 136,978.02 = 63,455.28 : x
  2. Step 2: Convert to fraction form
    99,327.54/136,978.02 = 63,455.28/x
  3. Step 3: Cross multiply
    99,327.54x = 136,978.02 × 63,455.28
  4. Step 4: Simplify right side
    99,327.54x = 8,691,978,612.95
  5. Step 5: Solve for x
    x = 8,691,978,612.95/99,327.54
  6. Step 6: Final answer
    x = 87,508.24

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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.