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Finding the Fourth Proportional to 121,288.68, 181,957.40 and 51,167.68

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Solution

The fourth proportional to 121,288.68, 181,957.40 and 51,167.68 is: 76,761.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,288.68 : 181,957.40 = 51,167.68 : x
  2. Step 2: Convert to fraction form
    121,288.68/181,957.40 = 51,167.68/x
  3. Step 3: Cross multiply
    121,288.68x = 181,957.40 × 51,167.68
  4. Step 4: Simplify right side
    121,288.68x = 9,310,338,016.83
  5. Step 5: Solve for x
    x = 9,310,338,016.83/121,288.68
  6. Step 6: Final answer
    x = 76,761.81

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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.