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Finding the Fourth Proportional to 78,859.26, 108,821.61 and 43,042.32

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Solution

The fourth proportional to 78,859.26, 108,821.61 and 43,042.32 is: 59,396.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,859.26 : 108,821.61 = 43,042.32 : x
  2. Step 2: Convert to fraction form
    78,859.26/108,821.61 = 43,042.32/x
  3. Step 3: Cross multiply
    78,859.26x = 108,821.61 × 43,042.32
  4. Step 4: Simplify right side
    78,859.26x = 4,683,934,560.54
  5. Step 5: Solve for x
    x = 4,683,934,560.54/78,859.26
  6. Step 6: Final answer
    x = 59,396.13

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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.