Home / 156,742.30-216,353.55-100,153.90

Finding the Fourth Proportional to 156,742.30, 216,353.55 and 100,153.90

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Solution

The fourth proportional to 156,742.30, 216,353.55 and 100,153.90 is: 138,243.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,742.30 : 216,353.55 = 100,153.90 : x
  2. Step 2: Convert to fraction form
    156,742.30/216,353.55 = 100,153.90/x
  3. Step 3: Cross multiply
    156,742.30x = 216,353.55 × 100,153.90
  4. Step 4: Simplify right side
    156,742.30x = 21,668,651,811.35
  5. Step 5: Solve for x
    x = 21,668,651,811.35/156,742.30
  6. Step 6: Final answer
    x = 138,243.80

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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.