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Finding the Fourth Proportional to 79,987.76, 120,022.28 and 48,473.12

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Solution

The fourth proportional to 79,987.76, 120,022.28 and 48,473.12 is: 72,734.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,987.76 : 120,022.28 = 48,473.12 : x
  2. Step 2: Convert to fraction form
    79,987.76/120,022.28 = 48,473.12/x
  3. Step 3: Cross multiply
    79,987.76x = 120,022.28 × 48,473.12
  4. Step 4: Simplify right side
    79,987.76x = 5,817,854,381.11
  5. Step 5: Solve for x
    x = 5,817,854,381.11/79,987.76
  6. Step 6: Final answer
    x = 72,734.31

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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.