Home / 78,445.85-108,255.92-42,635.88

Finding the Fourth Proportional to 78,445.85, 108,255.92 and 42,635.88

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Solution

The fourth proportional to 78,445.85, 108,255.92 and 42,635.88 is: 58,837.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,445.85 : 108,255.92 = 42,635.88 : x
  2. Step 2: Convert to fraction form
    78,445.85/108,255.92 = 42,635.88/x
  3. Step 3: Cross multiply
    78,445.85x = 108,255.92 × 42,635.88
  4. Step 4: Simplify right side
    78,445.85x = 4,615,586,201.23
  5. Step 5: Solve for x
    x = 4,615,586,201.23/78,445.85
  6. Step 6: Final answer
    x = 58,837.87

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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.