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Finding the Fourth Proportional to 159,967.20, 220,752.89 and 87,369.74

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Solution

The fourth proportional to 159,967.20, 220,752.89 and 87,369.74 is: 120,569.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,967.20 : 220,752.89 = 87,369.74 : x
  2. Step 2: Convert to fraction form
    159,967.20/220,752.89 = 87,369.74/x
  3. Step 3: Cross multiply
    159,967.20x = 220,752.89 × 87,369.74
  4. Step 4: Simplify right side
    159,967.20x = 19,287,122,709.85
  5. Step 5: Solve for x
    x = 19,287,122,709.85/159,967.20
  6. Step 6: Final answer
    x = 120,569.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.