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Finding the Fourth Proportional to 79,993.76, 120,031.28 and 48,479.12

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Solution

The fourth proportional to 79,993.76, 120,031.28 and 48,479.12 is: 72,743.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,993.76 : 120,031.28 = 48,479.12 : x
  2. Step 2: Convert to fraction form
    79,993.76/120,031.28 = 48,479.12/x
  3. Step 3: Cross multiply
    79,993.76x = 120,031.28 × 48,479.12
  4. Step 4: Simplify right side
    79,993.76x = 5,819,010,826.87
  5. Step 5: Solve for x
    x = 5,819,010,826.87/79,993.76
  6. Step 6: Final answer
    x = 72,743.31

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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.