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Finding the Fourth Proportional to 67,392.32, 92,971.80 and 40,519.28

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Solution

The fourth proportional to 67,392.32, 92,971.80 and 40,519.28 is: 55,898.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,392.32 : 92,971.80 = 40,519.28 : x
  2. Step 2: Convert to fraction form
    67,392.32/92,971.80 = 40,519.28/x
  3. Step 3: Cross multiply
    67,392.32x = 92,971.80 × 40,519.28
  4. Step 4: Simplify right side
    67,392.32x = 3,767,150,396.30
  5. Step 5: Solve for x
    x = 3,767,150,396.30/67,392.32
  6. Step 6: Final answer
    x = 55,898.81

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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.