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Finding the Fourth Proportional to 72,237, 99,691.48 and 40,408.04

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Solution

The fourth proportional to 72,237, 99,691.48 and 40,408.04 is: 55,765.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,237 : 99,691.48 = 40,408.04 : x
  2. Step 2: Convert to fraction form
    72,237/99,691.48 = 40,408.04/x
  3. Step 3: Cross multiply
    72,237x = 99,691.48 × 40,408.04
  4. Step 4: Simplify right side
    72,237x = 4,028,337,311.50
  5. Step 5: Solve for x
    x = 4,028,337,311.50/72,237
  6. Step 6: Final answer
    x = 55,765.57

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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.