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Finding the Fourth Proportional to 121,305.67, 181,975.51 and 42,401.95

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Solution

The fourth proportional to 121,305.67, 181,975.51 and 42,401.95 is: 63,608.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,305.67 : 181,975.51 = 42,401.95 : x
  2. Step 2: Convert to fraction form
    121,305.67/181,975.51 = 42,401.95/x
  3. Step 3: Cross multiply
    121,305.67x = 181,975.51 × 42,401.95
  4. Step 4: Simplify right side
    121,305.67x = 7,716,116,074.31
  5. Step 5: Solve for x
    x = 7,716,116,074.31/121,305.67
  6. Step 6: Final answer
    x = 63,608.87

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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.