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Finding the Fourth Proportional to 72,195.98, 99,627.17 and 39,930.91

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Solution

The fourth proportional to 72,195.98, 99,627.17 and 39,930.91 is: 55,102.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,195.98 : 99,627.17 = 39,930.91 : x
  2. Step 2: Convert to fraction form
    72,195.98/99,627.17 = 39,930.91/x
  3. Step 3: Cross multiply
    72,195.98x = 99,627.17 × 39,930.91
  4. Step 4: Simplify right side
    72,195.98x = 3,978,203,110.10
  5. Step 5: Solve for x
    x = 3,978,203,110.10/72,195.98
  6. Step 6: Final answer
    x = 55,102.84

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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.