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Finding the Fourth Proportional to 63,902.40, 95,865.12 and 21,780.15

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Solution

The fourth proportional to 63,902.40, 95,865.12 and 21,780.15 is: 32,674.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,902.40 : 95,865.12 = 21,780.15 : x
  2. Step 2: Convert to fraction form
    63,902.40/95,865.12 = 21,780.15/x
  3. Step 3: Cross multiply
    63,902.40x = 95,865.12 × 21,780.15
  4. Step 4: Simplify right side
    63,902.40x = 2,087,956,693.37
  5. Step 5: Solve for x
    x = 2,087,956,693.37/63,902.40
  6. Step 6: Final answer
    x = 32,674.15

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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.