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Finding the Fourth Proportional to 63,972, 95,965.92 and 21,856.32

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Solution

The fourth proportional to 63,972, 95,965.92 and 21,856.32 is: 32,787.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,972 : 95,965.92 = 21,856.32 : x
  2. Step 2: Convert to fraction form
    63,972/95,965.92 = 21,856.32/x
  3. Step 3: Cross multiply
    63,972x = 95,965.92 × 21,856.32
  4. Step 4: Simplify right side
    63,972x = 2,097,461,856.61
  5. Step 5: Solve for x
    x = 2,097,461,856.61/63,972
  6. Step 6: Final answer
    x = 32,787.19

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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.