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Finding the Fourth Proportional to 66,597.30, 99,909.92 and 19,212.30

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Solution

The fourth proportional to 66,597.30, 99,909.92 and 19,212.30 is: 28,822.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,597.30 : 99,909.92 = 19,212.30 : x
  2. Step 2: Convert to fraction form
    66,597.30/99,909.92 = 19,212.30/x
  3. Step 3: Cross multiply
    66,597.30x = 99,909.92 × 19,212.30
  4. Step 4: Simplify right side
    66,597.30x = 1,919,499,404.05
  5. Step 5: Solve for x
    x = 1,919,499,404.05/66,597.30
  6. Step 6: Final answer
    x = 28,822.48

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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.