Home / 109,046.20-163,569.30-71,721.40

Finding the Fourth Proportional to 109,046.20, 163,569.30 and 71,721.40

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Solution

The fourth proportional to 109,046.20, 163,569.30 and 71,721.40 is: 107,582.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,046.20 : 163,569.30 = 71,721.40 : x
  2. Step 2: Convert to fraction form
    109,046.20/163,569.30 = 71,721.40/x
  3. Step 3: Cross multiply
    109,046.20x = 163,569.30 × 71,721.40
  4. Step 4: Simplify right side
    109,046.20x = 11,731,419,193.02
  5. Step 5: Solve for x
    x = 11,731,419,193.02/109,046.20
  6. Step 6: Final answer
    x = 107,582.10

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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.