Home / 78,083.03-107,753.29-42,272.75

Finding the Fourth Proportional to 78,083.03, 107,753.29 and 42,272.75

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Solution

The fourth proportional to 78,083.03, 107,753.29 and 42,272.75 is: 58,335.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,083.03 : 107,753.29 = 42,272.75 : x
  2. Step 2: Convert to fraction form
    78,083.03/107,753.29 = 42,272.75/x
  3. Step 3: Cross multiply
    78,083.03x = 107,753.29 × 42,272.75
  4. Step 4: Simplify right side
    78,083.03x = 4,555,027,245.40
  5. Step 5: Solve for x
    x = 4,555,027,245.40/78,083.03
  6. Step 6: Final answer
    x = 58,335.69

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1.5x scale

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.