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Finding the Fourth Proportional to 66,108.10, 99,128.12 and 26,654.62

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Solution

The fourth proportional to 66,108.10, 99,128.12 and 26,654.62 is: 39,968.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,108.10 : 99,128.12 = 26,654.62 : x
  2. Step 2: Convert to fraction form
    66,108.10/99,128.12 = 26,654.62/x
  3. Step 3: Cross multiply
    66,108.10x = 99,128.12 × 26,654.62
  4. Step 4: Simplify right side
    66,108.10x = 2,642,222,369.91
  5. Step 5: Solve for x
    x = 2,642,222,369.91/66,108.10
  6. Step 6: Final answer
    x = 39,968.21

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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.