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Finding the Fourth Proportional to 71,274.32, 98,369.61 and 40,647.48

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Solution

The fourth proportional to 71,274.32, 98,369.61 and 40,647.48 is: 56,099.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,274.32 : 98,369.61 = 40,647.48 : x
  2. Step 2: Convert to fraction form
    71,274.32/98,369.61 = 40,647.48/x
  3. Step 3: Cross multiply
    71,274.32x = 98,369.61 × 40,647.48
  4. Step 4: Simplify right side
    71,274.32x = 3,998,476,755.08
  5. Step 5: Solve for x
    x = 3,998,476,755.08/71,274.32
  6. Step 6: Final answer
    x = 56,099.82

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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.