Home / 73,085.18-109,631.88-20,498.78

Finding the Fourth Proportional to 73,085.18, 109,631.88 and 20,498.78

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Solution

The fourth proportional to 73,085.18, 109,631.88 and 20,498.78 is: 30,749.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,085.18 : 109,631.88 = 20,498.78 : x
  2. Step 2: Convert to fraction form
    73,085.18/109,631.88 = 20,498.78/x
  3. Step 3: Cross multiply
    73,085.18x = 109,631.88 × 20,498.78
  4. Step 4: Simplify right side
    73,085.18x = 2,247,319,789.11
  5. Step 5: Solve for x
    x = 2,247,319,789.11/73,085.18
  6. Step 6: Final answer
    x = 30,749.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.