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Finding the Fourth Proportional to 97,236.80, 145,855.20 and 82,721.60

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Solution

The fourth proportional to 97,236.80, 145,855.20 and 82,721.60 is: 124,082.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,236.80 : 145,855.20 = 82,721.60 : x
  2. Step 2: Convert to fraction form
    97,236.80/145,855.20 = 82,721.60/x
  3. Step 3: Cross multiply
    97,236.80x = 145,855.20 × 82,721.60
  4. Step 4: Simplify right side
    97,236.80x = 12,065,375,512.32
  5. Step 5: Solve for x
    x = 12,065,375,512.32/97,236.80
  6. Step 6: Final answer
    x = 124,082.40

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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.