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Finding the Fourth Proportional to 74,405.92, 102,680.92 and 40,414.72

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Solution

The fourth proportional to 74,405.92, 102,680.92 and 40,414.72 is: 55,772.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,405.92 : 102,680.92 = 40,414.72 : x
  2. Step 2: Convert to fraction form
    74,405.92/102,680.92 = 40,414.72/x
  3. Step 3: Cross multiply
    74,405.92x = 102,680.92 × 40,414.72
  4. Step 4: Simplify right side
    74,405.92x = 4,149,820,678.94
  5. Step 5: Solve for x
    x = 4,149,820,678.94/74,405.92
  6. Step 6: Final answer
    x = 55,772.72

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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.