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Finding the Fourth Proportional to 66,295.12, 99,432.80 and 21,922.10

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Solution

The fourth proportional to 66,295.12, 99,432.80 and 21,922.10 is: 32,879.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,295.12 : 99,432.80 = 21,922.10 : x
  2. Step 2: Convert to fraction form
    66,295.12/99,432.80 = 21,922.10/x
  3. Step 3: Cross multiply
    66,295.12x = 99,432.80 × 21,922.10
  4. Step 4: Simplify right side
    66,295.12x = 2,179,776,088.27
  5. Step 5: Solve for x
    x = 2,179,776,088.27/66,295.12
  6. Step 6: Final answer
    x = 32,879.89

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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.