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Finding the Fourth Proportional to 156,692.72, 216,238.20 and 85,072.88

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Solution

The fourth proportional to 156,692.72, 216,238.20 and 85,072.88 is: 117,401.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,692.72 : 216,238.20 = 85,072.88 : x
  2. Step 2: Convert to fraction form
    156,692.72/216,238.20 = 85,072.88/x
  3. Step 3: Cross multiply
    156,692.72x = 216,238.20 × 85,072.88
  4. Step 4: Simplify right side
    156,692.72x = 18,396,006,440.02
  5. Step 5: Solve for x
    x = 18,396,006,440.02/156,692.72
  6. Step 6: Final answer
    x = 117,401.79

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1.5x scale

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.