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Finding the Fourth Proportional to 79,351.46, 119,027.88 and 20,187.20

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Solution

The fourth proportional to 79,351.46, 119,027.88 and 20,187.20 is: 30,280.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,351.46 : 119,027.88 = 20,187.20 : x
  2. Step 2: Convert to fraction form
    79,351.46/119,027.88 = 20,187.20/x
  3. Step 3: Cross multiply
    79,351.46x = 119,027.88 × 20,187.20
  4. Step 4: Simplify right side
    79,351.46x = 2,402,839,024.00
  5. Step 5: Solve for x
    x = 2,402,839,024.00/79,351.46
  6. Step 6: Final answer
    x = 30,280.97

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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.