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Finding the Fourth Proportional to 66,373.72, 99,555.02 and 21,985.96

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Solution

The fourth proportional to 66,373.72, 99,555.02 and 21,985.96 is: 32,977.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,373.72 : 99,555.02 = 21,985.96 : x
  2. Step 2: Convert to fraction form
    66,373.72/99,555.02 = 21,985.96/x
  3. Step 3: Cross multiply
    66,373.72x = 99,555.02 × 21,985.96
  4. Step 4: Simplify right side
    66,373.72x = 2,188,812,687.52
  5. Step 5: Solve for x
    x = 2,188,812,687.52/66,373.72
  6. Step 6: Final answer
    x = 32,977.10

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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.