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Finding the Fourth Proportional to 71,823, 99,115.74 and 39,559.35

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Solution

The fourth proportional to 71,823, 99,115.74 and 39,559.35 is: 54,591.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,823 : 99,115.74 = 39,559.35 : x
  2. Step 2: Convert to fraction form
    71,823/99,115.74 = 39,559.35/x
  3. Step 3: Cross multiply
    71,823x = 99,115.74 × 39,559.35
  4. Step 4: Simplify right side
    71,823x = 3,920,954,249.17
  5. Step 5: Solve for x
    x = 3,920,954,249.17/71,823
  6. Step 6: Final answer
    x = 54,591.90

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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.