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Finding the Fourth Proportional to 67,913.55, 101,880.03 and 21,170.07

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Solution

The fourth proportional to 67,913.55, 101,880.03 and 21,170.07 is: 31,758.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,913.55 : 101,880.03 = 21,170.07 : x
  2. Step 2: Convert to fraction form
    67,913.55/101,880.03 = 21,170.07/x
  3. Step 3: Cross multiply
    67,913.55x = 101,880.03 × 21,170.07
  4. Step 4: Simplify right side
    67,913.55x = 2,156,807,366.70
  5. Step 5: Solve for x
    x = 2,156,807,366.70/67,913.55
  6. Step 6: Final answer
    x = 31,758.13

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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.