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Finding the Fourth Proportional to 81,341.76, 121,834.92 and 33,812.76

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Solution

The fourth proportional to 81,341.76, 121,834.92 and 33,812.76 is: 50,645.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,341.76 : 121,834.92 = 33,812.76 : x
  2. Step 2: Convert to fraction form
    81,341.76/121,834.92 = 33,812.76/x
  3. Step 3: Cross multiply
    81,341.76x = 121,834.92 × 33,812.76
  4. Step 4: Simplify right side
    81,341.76x = 4,119,574,909.58
  5. Step 5: Solve for x
    x = 4,119,574,909.58/81,341.76
  6. Step 6: Final answer
    x = 50,645.26

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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.