Home / 78,456.26-118,111.27-71,481.08

Finding the Fourth Proportional to 78,456.26, 118,111.27 and 71,481.08

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Solution

The fourth proportional to 78,456.26, 118,111.27 and 71,481.08 is: 107,610.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,456.26 : 118,111.27 = 71,481.08 : x
  2. Step 2: Convert to fraction form
    78,456.26/118,111.27 = 71,481.08/x
  3. Step 3: Cross multiply
    78,456.26x = 118,111.27 × 71,481.08
  4. Step 4: Simplify right side
    78,456.26x = 8,442,720,549.22
  5. Step 5: Solve for x
    x = 8,442,720,549.22/78,456.26
  6. Step 6: Final answer
    x = 107,610.55

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.