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Finding the Fourth Proportional to 80,948.70, 121,401.45 and 28,352.70

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Solution

The fourth proportional to 80,948.70, 121,401.45 and 28,352.70 is: 42,521.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,948.70 : 121,401.45 = 28,352.70 : x
  2. Step 2: Convert to fraction form
    80,948.70/121,401.45 = 28,352.70/x
  3. Step 3: Cross multiply
    80,948.70x = 121,401.45 × 28,352.70
  4. Step 4: Simplify right side
    80,948.70x = 3,442,058,891.42
  5. Step 5: Solve for x
    x = 3,442,058,891.42/80,948.70
  6. Step 6: Final answer
    x = 42,521.48

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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.