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Finding the Fourth Proportional to 72,336.76, 108,401.75 and 40,680.38

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Solution

The fourth proportional to 72,336.76, 108,401.75 and 40,680.38 is: 60,962.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,336.76 : 108,401.75 = 40,680.38 : x
  2. Step 2: Convert to fraction form
    72,336.76/108,401.75 = 40,680.38/x
  3. Step 3: Cross multiply
    72,336.76x = 108,401.75 × 40,680.38
  4. Step 4: Simplify right side
    72,336.76x = 4,409,824,382.67
  5. Step 5: Solve for x
    x = 4,409,824,382.67/72,336.76
  6. Step 6: Final answer
    x = 60,962.43

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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.