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Finding the Fourth Proportional to 71,993.79, 99,349.10 and 39,286.95

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Solution

The fourth proportional to 71,993.79, 99,349.10 and 39,286.95 is: 54,214.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,993.79 : 99,349.10 = 39,286.95 : x
  2. Step 2: Convert to fraction form
    71,993.79/99,349.10 = 39,286.95/x
  3. Step 3: Cross multiply
    71,993.79x = 99,349.10 × 39,286.95
  4. Step 4: Simplify right side
    71,993.79x = 3,903,122,725.72
  5. Step 5: Solve for x
    x = 3,903,122,725.72/71,993.79
  6. Step 6: Final answer
    x = 54,214.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.