Home / 64,981.29-89,680.21-39,481.78

Finding the Fourth Proportional to 64,981.29, 89,680.21 and 39,481.78

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Solution

The fourth proportional to 64,981.29, 89,680.21 and 39,481.78 is: 54,488.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,981.29 : 89,680.21 = 39,481.78 : x
  2. Step 2: Convert to fraction form
    64,981.29/89,680.21 = 39,481.78/x
  3. Step 3: Cross multiply
    64,981.29x = 89,680.21 × 39,481.78
  4. Step 4: Simplify right side
    64,981.29x = 3,540,733,998.67
  5. Step 5: Solve for x
    x = 3,540,733,998.67/64,981.29
  6. Step 6: Final answer
    x = 54,488.52

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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.