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Finding the Fourth Proportional to 63,921.88, 88,371.64 and 47,978.64

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Solution

The fourth proportional to 63,921.88, 88,371.64 and 47,978.64 is: 66,330.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,921.88 : 88,371.64 = 47,978.64 : x
  2. Step 2: Convert to fraction form
    63,921.88/88,371.64 = 47,978.64/x
  3. Step 3: Cross multiply
    63,921.88x = 88,371.64 × 47,978.64
  4. Step 4: Simplify right side
    63,921.88x = 4,239,951,101.77
  5. Step 5: Solve for x
    x = 4,239,951,101.77/63,921.88
  6. Step 6: Final answer
    x = 66,330.20

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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.