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Finding the Fourth Proportional to 90,692.20, 136,184.10 and 65,906.20

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Solution

The fourth proportional to 90,692.20, 136,184.10 and 65,906.20 is: 98,965.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,692.20 : 136,184.10 = 65,906.20 : x
  2. Step 2: Convert to fraction form
    90,692.20/136,184.10 = 65,906.20/x
  3. Step 3: Cross multiply
    90,692.20x = 136,184.10 × 65,906.20
  4. Step 4: Simplify right side
    90,692.20x = 8,975,376,531.42
  5. Step 5: Solve for x
    x = 8,975,376,531.42/90,692.20
  6. Step 6: Final answer
    x = 98,965.25

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1.5x scale

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.