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Finding the Fourth Proportional to 89,793, 134,690.18 and 39,859.68

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Solution

The fourth proportional to 89,793, 134,690.18 and 39,859.68 is: 59,789.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,793 : 134,690.18 = 39,859.68 : x
  2. Step 2: Convert to fraction form
    89,793/134,690.18 = 39,859.68/x
  3. Step 3: Cross multiply
    89,793x = 134,690.18 × 39,859.68
  4. Step 4: Simplify right side
    89,793x = 5,368,707,274.64
  5. Step 5: Solve for x
    x = 5,368,707,274.64/89,793
  6. Step 6: Final answer
    x = 59,789.82

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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.