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Finding the Fourth Proportional to 235,991.93, 325,667.58 and 128,561.70

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Solution

The fourth proportional to 235,991.93, 325,667.58 and 128,561.70 is: 177,414.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,991.93 : 325,667.58 = 128,561.70 : x
  2. Step 2: Convert to fraction form
    235,991.93/325,667.58 = 128,561.70/x
  3. Step 3: Cross multiply
    235,991.93x = 325,667.58 × 128,561.70
  4. Step 4: Simplify right side
    235,991.93x = 41,868,377,719.69
  5. Step 5: Solve for x
    x = 41,868,377,719.69/235,991.93
  6. Step 6: Final answer
    x = 177,414.45

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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.