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Finding the Fourth Proportional to 296,872.30, 445,308.45 and 86,517.10

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Solution

The fourth proportional to 296,872.30, 445,308.45 and 86,517.10 is: 129,775.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    296,872.30 : 445,308.45 = 86,517.10 : x
  2. Step 2: Convert to fraction form
    296,872.30/445,308.45 = 86,517.10/x
  3. Step 3: Cross multiply
    296,872.30x = 445,308.45 × 86,517.10
  4. Step 4: Simplify right side
    296,872.30x = 38,526,795,699.50
  5. Step 5: Solve for x
    x = 38,526,795,699.50/296,872.30
  6. Step 6: Final answer
    x = 129,775.65

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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.