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Finding the Fourth Proportional to 79,470.85, 109,672.32 and 43,661.65

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Solution

The fourth proportional to 79,470.85, 109,672.32 and 43,661.65 is: 60,254.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,470.85 : 109,672.32 = 43,661.65 : x
  2. Step 2: Convert to fraction form
    79,470.85/109,672.32 = 43,661.65/x
  3. Step 3: Cross multiply
    79,470.85x = 109,672.32 × 43,661.65
  4. Step 4: Simplify right side
    79,470.85x = 4,788,474,450.53
  5. Step 5: Solve for x
    x = 4,788,474,450.53/79,470.85
  6. Step 6: Final answer
    x = 60,254.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.