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Finding the Fourth Proportional to 67,218.76, 92,751.78 and 40,357

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Solution

The fourth proportional to 67,218.76, 92,751.78 and 40,357 is: 55,686.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,218.76 : 92,751.78 = 40,357 : x
  2. Step 2: Convert to fraction form
    67,218.76/92,751.78 = 40,357/x
  3. Step 3: Cross multiply
    67,218.76x = 92,751.78 × 40,357
  4. Step 4: Simplify right side
    67,218.76x = 3,743,183,585.46
  5. Step 5: Solve for x
    x = 3,743,183,585.46/67,218.76
  6. Step 6: Final answer
    x = 55,686.59

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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.