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Finding the Fourth Proportional to 66,543.68, 99,817.20 and 19,796.96

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Solution

The fourth proportional to 66,543.68, 99,817.20 and 19,796.96 is: 29,695.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,543.68 : 99,817.20 = 19,796.96 : x
  2. Step 2: Convert to fraction form
    66,543.68/99,817.20 = 19,796.96/x
  3. Step 3: Cross multiply
    66,543.68x = 99,817.20 × 19,796.96
  4. Step 4: Simplify right side
    66,543.68x = 1,976,077,115.71
  5. Step 5: Solve for x
    x = 1,976,077,115.71/66,543.68
  6. Step 6: Final answer
    x = 29,695.94

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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.