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Finding the Fourth Proportional to 67,913.80, 101,880.41 and 21,170.32

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Solution

The fourth proportional to 67,913.80, 101,880.41 and 21,170.32 is: 31,758.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,913.80 : 101,880.41 = 21,170.32 : x
  2. Step 2: Convert to fraction form
    67,913.80/101,880.41 = 21,170.32/x
  3. Step 3: Cross multiply
    67,913.80x = 101,880.41 × 21,170.32
  4. Step 4: Simplify right side
    67,913.80x = 2,156,840,881.43
  5. Step 5: Solve for x
    x = 2,156,840,881.43/67,913.80
  6. Step 6: Final answer
    x = 31,758.51

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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.