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Finding the Fourth Proportional to 121,290.68, 181,960.40 and 51,169.68

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Solution

The fourth proportional to 121,290.68, 181,960.40 and 51,169.68 is: 76,764.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,290.68 : 181,960.40 = 51,169.68 : x
  2. Step 2: Convert to fraction form
    121,290.68/181,960.40 = 51,169.68/x
  3. Step 3: Cross multiply
    121,290.68x = 181,960.40 × 51,169.68
  4. Step 4: Simplify right side
    121,290.68x = 9,310,855,440.67
  5. Step 5: Solve for x
    x = 9,310,855,440.67/121,290.68
  6. Step 6: Final answer
    x = 76,764.81

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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.