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Finding the Fourth Proportional to 66,540.95, 99,813.75 and 21,561.24

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Solution

The fourth proportional to 66,540.95, 99,813.75 and 21,561.24 is: 32,342.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,540.95 : 99,813.75 = 21,561.24 : x
  2. Step 2: Convert to fraction form
    66,540.95/99,813.75 = 21,561.24/x
  3. Step 3: Cross multiply
    66,540.95x = 99,813.75 × 21,561.24
  4. Step 4: Simplify right side
    66,540.95x = 2,152,108,219.05
  5. Step 5: Solve for x
    x = 2,152,108,219.05/66,540.95
  6. Step 6: Final answer
    x = 32,342.61

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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.