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Finding the Fourth Proportional to 65,902.61, 98,863.58 and 20,908.96

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Solution

The fourth proportional to 65,902.61, 98,863.58 and 20,908.96 is: 31,366.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,902.61 : 98,863.58 = 20,908.96 : x
  2. Step 2: Convert to fraction form
    65,902.61/98,863.58 = 20,908.96/x
  3. Step 3: Cross multiply
    65,902.61x = 98,863.58 × 20,908.96
  4. Step 4: Simplify right side
    65,902.61x = 2,067,134,444.79
  5. Step 5: Solve for x
    x = 2,067,134,444.79/65,902.61
  6. Step 6: Final answer
    x = 31,366.50

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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.