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Finding the Fourth Proportional to 72,134.92, 99,551.34 and 39,868.85

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Solution

The fourth proportional to 72,134.92, 99,551.34 and 39,868.85 is: 55,021.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,134.92 : 99,551.34 = 39,868.85 : x
  2. Step 2: Convert to fraction form
    72,134.92/99,551.34 = 39,868.85/x
  3. Step 3: Cross multiply
    72,134.92x = 99,551.34 × 39,868.85
  4. Step 4: Simplify right side
    72,134.92x = 3,968,997,192.88
  5. Step 5: Solve for x
    x = 3,968,997,192.88/72,134.92
  6. Step 6: Final answer
    x = 55,021.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.