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Finding the Fourth Proportional to 66,282.72, 99,403.02 and 21,901.20

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Solution

The fourth proportional to 66,282.72, 99,403.02 and 21,901.20 is: 32,844.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,282.72 : 99,403.02 = 21,901.20 : x
  2. Step 2: Convert to fraction form
    66,282.72/99,403.02 = 21,901.20/x
  3. Step 3: Cross multiply
    66,282.72x = 99,403.02 × 21,901.20
  4. Step 4: Simplify right side
    66,282.72x = 2,177,045,421.62
  5. Step 5: Solve for x
    x = 2,177,045,421.62/66,282.72
  6. Step 6: Final answer
    x = 32,844.84

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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.