Home / 102,990.43-154,507.68-31,911.49

Finding the Fourth Proportional to 102,990.43, 154,507.68 and 31,911.49

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Solution

The fourth proportional to 102,990.43, 154,507.68 and 31,911.49 is: 47,874.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,990.43 : 154,507.68 = 31,911.49 : x
  2. Step 2: Convert to fraction form
    102,990.43/154,507.68 = 31,911.49/x
  3. Step 3: Cross multiply
    102,990.43x = 154,507.68 × 31,911.49
  4. Step 4: Simplify right side
    102,990.43x = 4,930,569,898.97
  5. Step 5: Solve for x
    x = 4,930,569,898.97/102,990.43
  6. Step 6: Final answer
    x = 47,874.06

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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.