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Finding the Fourth Proportional to 136,365.66, 188,087.67 and 91,020.78

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Solution

The fourth proportional to 136,365.66, 188,087.67 and 91,020.78 is: 125,543.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,365.66 : 188,087.67 = 91,020.78 : x
  2. Step 2: Convert to fraction form
    136,365.66/188,087.67 = 91,020.78/x
  3. Step 3: Cross multiply
    136,365.66x = 188,087.67 × 91,020.78
  4. Step 4: Simplify right side
    136,365.66x = 17,119,886,431.78
  5. Step 5: Solve for x
    x = 17,119,886,431.78/136,365.66
  6. Step 6: Final answer
    x = 125,543.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.