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Finding the Fourth Proportional to 63,718.05, 87,921.28 and 36,489.90

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Solution

The fourth proportional to 63,718.05, 87,921.28 and 36,489.90 is: 50,350.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,718.05 : 87,921.28 = 36,489.90 : x
  2. Step 2: Convert to fraction form
    63,718.05/87,921.28 = 36,489.90/x
  3. Step 3: Cross multiply
    63,718.05x = 87,921.28 × 36,489.90
  4. Step 4: Simplify right side
    63,718.05x = 3,208,238,953.55
  5. Step 5: Solve for x
    x = 3,208,238,953.55/63,718.05
  6. Step 6: Final answer
    x = 50,350.55

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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.