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Finding the Fourth Proportional to 66,454.58, 99,701.17 and 21,474.99

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Solution

The fourth proportional to 66,454.58, 99,701.17 and 21,474.99 is: 32,218.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,454.58 : 99,701.17 = 21,474.99 : x
  2. Step 2: Convert to fraction form
    66,454.58/99,701.17 = 21,474.99/x
  3. Step 3: Cross multiply
    66,454.58x = 99,701.17 × 21,474.99
  4. Step 4: Simplify right side
    66,454.58x = 2,141,081,575.05
  5. Step 5: Solve for x
    x = 2,141,081,575.05/66,454.58
  6. Step 6: Final answer
    x = 32,218.72

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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.