Home / 78,512.22-108,347.37-42,702.48

Finding the Fourth Proportional to 78,512.22, 108,347.37 and 42,702.48

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Solution

The fourth proportional to 78,512.22, 108,347.37 and 42,702.48 is: 58,929.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,512.22 : 108,347.37 = 42,702.48 : x
  2. Step 2: Convert to fraction form
    78,512.22/108,347.37 = 42,702.48/x
  3. Step 3: Cross multiply
    78,512.22x = 108,347.37 × 42,702.48
  4. Step 4: Simplify right side
    78,512.22x = 4,626,701,400.48
  5. Step 5: Solve for x
    x = 4,626,701,400.48/78,512.22
  6. Step 6: Final answer
    x = 58,929.70

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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.