Home / 221,478.10-331,990.35-108,985.30

Finding the Fourth Proportional to 221,478.10, 331,990.35 and 108,985.30

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Solution

The fourth proportional to 221,478.10, 331,990.35 and 108,985.30 is: 163,366.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,478.10 : 331,990.35 = 108,985.30 : x
  2. Step 2: Convert to fraction form
    221,478.10/331,990.35 = 108,985.30/x
  3. Step 3: Cross multiply
    221,478.10x = 331,990.35 × 108,985.30
  4. Step 4: Simplify right side
    221,478.10x = 36,182,067,891.86
  5. Step 5: Solve for x
    x = 36,182,067,891.86/221,478.10
  6. Step 6: Final answer
    x = 163,366.35

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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.