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Finding the Fourth Proportional to 40,904.60, 61,356.90 and 36,311.90

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Solution

The fourth proportional to 40,904.60, 61,356.90 and 36,311.90 is: 54,467.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,904.60 : 61,356.90 = 36,311.90 : x
  2. Step 2: Convert to fraction form
    40,904.60/61,356.90 = 36,311.90/x
  3. Step 3: Cross multiply
    40,904.60x = 61,356.90 × 36,311.90
  4. Step 4: Simplify right side
    40,904.60x = 2,227,985,617.11
  5. Step 5: Solve for x
    x = 2,227,985,617.11/40,904.60
  6. Step 6: Final answer
    x = 54,467.85

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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.