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Finding the Fourth Proportional to 71,378.20, 107,067.30 and 43,730.20

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Solution

The fourth proportional to 71,378.20, 107,067.30 and 43,730.20 is: 65,595.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,378.20 : 107,067.30 = 43,730.20 : x
  2. Step 2: Convert to fraction form
    71,378.20/107,067.30 = 43,730.20/x
  3. Step 3: Cross multiply
    71,378.20x = 107,067.30 × 43,730.20
  4. Step 4: Simplify right side
    71,378.20x = 4,682,074,442.46
  5. Step 5: Solve for x
    x = 4,682,074,442.46/71,378.20
  6. Step 6: Final answer
    x = 65,595.30

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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.