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Finding the Fourth Proportional to 80,279.85, 120,420.07 and 26,970.31

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Solution

The fourth proportional to 80,279.85, 120,420.07 and 26,970.31 is: 40,455.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,279.85 : 120,420.07 = 26,970.31 : x
  2. Step 2: Convert to fraction form
    80,279.85/120,420.07 = 26,970.31/x
  3. Step 3: Cross multiply
    80,279.85x = 120,420.07 × 26,970.31
  4. Step 4: Simplify right side
    80,279.85x = 3,247,766,701.22
  5. Step 5: Solve for x
    x = 3,247,766,701.22/80,279.85
  6. Step 6: Final answer
    x = 40,455.56

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1.5x scale

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.