Home / 156,337.20-215,735.13-99,742.50

Finding the Fourth Proportional to 156,337.20, 215,735.13 and 99,742.50

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Solution

The fourth proportional to 156,337.20, 215,735.13 and 99,742.50 is: 137,638.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,337.20 : 215,735.13 = 99,742.50 : x
  2. Step 2: Convert to fraction form
    156,337.20/215,735.13 = 99,742.50/x
  3. Step 3: Cross multiply
    156,337.20x = 215,735.13 × 99,742.50
  4. Step 4: Simplify right side
    156,337.20x = 21,517,961,204.03
  5. Step 5: Solve for x
    x = 21,517,961,204.03/156,337.20
  6. Step 6: Final answer
    x = 137,638.14

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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.