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Finding the Fourth Proportional to 113,479.76, 170,230.92 and 43,418

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Solution

The fourth proportional to 113,479.76, 170,230.92 and 43,418 is: 65,131.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,479.76 : 170,230.92 = 43,418 : x
  2. Step 2: Convert to fraction form
    113,479.76/170,230.92 = 43,418/x
  3. Step 3: Cross multiply
    113,479.76x = 170,230.92 × 43,418
  4. Step 4: Simplify right side
    113,479.76x = 7,391,086,084.56
  5. Step 5: Solve for x
    x = 7,391,086,084.56/113,479.76
  6. Step 6: Final answer
    x = 65,131.32

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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.