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Finding the Fourth Proportional to 72,196.80, 108,165.60 and 63,902.40

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Solution

The fourth proportional to 72,196.80, 108,165.60 and 63,902.40 is: 95,738.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,196.80 : 108,165.60 = 63,902.40 : x
  2. Step 2: Convert to fraction form
    72,196.80/108,165.60 = 63,902.40/x
  3. Step 3: Cross multiply
    72,196.80x = 108,165.60 × 63,902.40
  4. Step 4: Simplify right side
    72,196.80x = 6,912,041,437.44
  5. Step 5: Solve for x
    x = 6,912,041,437.44/72,196.80
  6. Step 6: Final answer
    x = 95,738.89

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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.