Home / 102,768.38-141,802.20-57,431.87

Finding the Fourth Proportional to 102,768.38, 141,802.20 and 57,431.87

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Solution

The fourth proportional to 102,768.38, 141,802.20 and 57,431.87 is: 79,245.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,768.38 : 141,802.20 = 57,431.87 : x
  2. Step 2: Convert to fraction form
    102,768.38/141,802.20 = 57,431.87/x
  3. Step 3: Cross multiply
    102,768.38x = 141,802.20 × 57,431.87
  4. Step 4: Simplify right side
    102,768.38x = 8,143,965,516.11
  5. Step 5: Solve for x
    x = 8,143,965,516.11/102,768.38
  6. Step 6: Final answer
    x = 79,245.83

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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.