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Finding the Fourth Proportional to 79,551.90, 119,325.15 and 20,388.15

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Solution

The fourth proportional to 79,551.90, 119,325.15 and 20,388.15 is: 30,581.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,551.90 : 119,325.15 = 20,388.15 : x
  2. Step 2: Convert to fraction form
    79,551.90/119,325.15 = 20,388.15/x
  3. Step 3: Cross multiply
    79,551.90x = 119,325.15 × 20,388.15
  4. Step 4: Simplify right side
    79,551.90x = 2,432,819,056.97
  5. Step 5: Solve for x
    x = 2,432,819,056.97/79,551.90
  6. Step 6: Final answer
    x = 30,581.53

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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.