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Finding the Fourth Proportional to 71,419.45, 107,150.13 and 31,967.79

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Solution

The fourth proportional to 71,419.45, 107,150.13 and 31,967.79 is: 47,961.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,419.45 : 107,150.13 = 31,967.79 : x
  2. Step 2: Convert to fraction form
    71,419.45/107,150.13 = 31,967.79/x
  3. Step 3: Cross multiply
    71,419.45x = 107,150.13 × 31,967.79
  4. Step 4: Simplify right side
    71,419.45x = 3,425,352,854.31
  5. Step 5: Solve for x
    x = 3,425,352,854.31/71,419.45
  6. Step 6: Final answer
    x = 47,961.07

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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.