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Finding the Fourth Proportional to 72,176.80, 108,135.60 and 63,882.40

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Solution

The fourth proportional to 72,176.80, 108,135.60 and 63,882.40 is: 95,708.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,176.80 : 108,135.60 = 63,882.40 : x
  2. Step 2: Convert to fraction form
    72,176.80/108,135.60 = 63,882.40/x
  3. Step 3: Cross multiply
    72,176.80x = 108,135.60 × 63,882.40
  4. Step 4: Simplify right side
    72,176.80x = 6,907,961,653.44
  5. Step 5: Solve for x
    x = 6,907,961,653.44/72,176.80
  6. Step 6: Final answer
    x = 95,708.89

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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.