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Finding the Fourth Proportional to 66,638.66, 99,985.62 and 29,179.40

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Solution

The fourth proportional to 66,638.66, 99,985.62 and 29,179.40 is: 43,781.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,638.66 : 99,985.62 = 29,179.40 : x
  2. Step 2: Convert to fraction form
    66,638.66/99,985.62 = 29,179.40/x
  3. Step 3: Cross multiply
    66,638.66x = 99,985.62 × 29,179.40
  4. Step 4: Simplify right side
    66,638.66x = 2,917,520,400.23
  5. Step 5: Solve for x
    x = 2,917,520,400.23/66,638.66
  6. Step 6: Final answer
    x = 43,781.20

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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.