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Finding the Fourth Proportional to 72,658.20, 108,987.30 and 63,910.20

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Solution

The fourth proportional to 72,658.20, 108,987.30 and 63,910.20 is: 95,865.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,658.20 : 108,987.30 = 63,910.20 : x
  2. Step 2: Convert to fraction form
    72,658.20/108,987.30 = 63,910.20/x
  3. Step 3: Cross multiply
    72,658.20x = 108,987.30 × 63,910.20
  4. Step 4: Simplify right side
    72,658.20x = 6,965,400,140.46
  5. Step 5: Solve for x
    x = 6,965,400,140.46/72,658.20
  6. Step 6: Final answer
    x = 95,865.30

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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.