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Finding the Fourth Proportional to 71,993.16, 99,348.24 and 39,286.32

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Solution

The fourth proportional to 71,993.16, 99,348.24 and 39,286.32 is: 54,213.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,993.16 : 99,348.24 = 39,286.32 : x
  2. Step 2: Convert to fraction form
    71,993.16/99,348.24 = 39,286.32/x
  3. Step 3: Cross multiply
    71,993.16x = 99,348.24 × 39,286.32
  4. Step 4: Simplify right side
    71,993.16x = 3,903,026,748.08
  5. Step 5: Solve for x
    x = 3,903,026,748.08/71,993.16
  6. Step 6: Final answer
    x = 54,213.86

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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.