Home / 156,743.30-216,354.93-100,154.90

Finding the Fourth Proportional to 156,743.30, 216,354.93 and 100,154.90

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Solution

The fourth proportional to 156,743.30, 216,354.93 and 100,154.90 is: 138,245.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,743.30 : 216,354.93 = 100,154.90 : x
  2. Step 2: Convert to fraction form
    156,743.30/216,354.93 = 100,154.90/x
  3. Step 3: Cross multiply
    156,743.30x = 216,354.93 × 100,154.90
  4. Step 4: Simplify right side
    156,743.30x = 21,669,006,378.66
  5. Step 5: Solve for x
    x = 21,669,006,378.66/156,743.30
  6. Step 6: Final answer
    x = 138,245.18

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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.