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Finding the Fourth Proportional to 121,287.69, 181,923.01 and 45,371.75

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Solution

The fourth proportional to 121,287.69, 181,923.01 and 45,371.75 is: 68,054.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,287.69 : 181,923.01 = 45,371.75 : x
  2. Step 2: Convert to fraction form
    121,287.69/181,923.01 = 45,371.75/x
  3. Step 3: Cross multiply
    121,287.69x = 181,923.01 × 45,371.75
  4. Step 4: Simplify right side
    121,287.69x = 8,254,164,305.92
  5. Step 5: Solve for x
    x = 8,254,164,305.92/121,287.69
  6. Step 6: Final answer
    x = 68,054.43

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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.