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Finding the Fourth Proportional to 71,145.20, 106,717.80 and 67,062.80

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Solution

The fourth proportional to 71,145.20, 106,717.80 and 67,062.80 is: 100,594.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,145.20 : 106,717.80 = 67,062.80 : x
  2. Step 2: Convert to fraction form
    71,145.20/106,717.80 = 67,062.80/x
  3. Step 3: Cross multiply
    71,145.20x = 106,717.80 × 67,062.80
  4. Step 4: Simplify right side
    71,145.20x = 7,156,794,477.84
  5. Step 5: Solve for x
    x = 7,156,794,477.84/71,145.20
  6. Step 6: Final answer
    x = 100,594.20

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1.5x scale

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.