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Finding the Fourth Proportional to 66,118.80, 99,187.92 and 21,737.28

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Solution

The fourth proportional to 66,118.80, 99,187.92 and 21,737.28 is: 32,609.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,118.80 : 99,187.92 = 21,737.28 : x
  2. Step 2: Convert to fraction form
    66,118.80/99,187.92 = 21,737.28/x
  3. Step 3: Cross multiply
    66,118.80x = 99,187.92 × 21,737.28
  4. Step 4: Simplify right side
    66,118.80x = 2,156,075,589.66
  5. Step 5: Solve for x
    x = 2,156,075,589.66/66,118.80
  6. Step 6: Final answer
    x = 32,609.12

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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.