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Finding the Fourth Proportional to 71,385.63, 107,074.32 and 21,464.79

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Solution

The fourth proportional to 71,385.63, 107,074.32 and 21,464.79 is: 32,195.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,385.63 : 107,074.32 = 21,464.79 : x
  2. Step 2: Convert to fraction form
    71,385.63/107,074.32 = 21,464.79/x
  3. Step 3: Cross multiply
    71,385.63x = 107,074.32 × 21,464.79
  4. Step 4: Simplify right side
    71,385.63x = 2,298,327,793.19
  5. Step 5: Solve for x
    x = 2,298,327,793.19/71,385.63
  6. Step 6: Final answer
    x = 32,195.94

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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.