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Finding the Fourth Proportional to 98,351.42, 135,724.75 and 55,330.97

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Solution

The fourth proportional to 98,351.42, 135,724.75 and 55,330.97 is: 76,356.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,351.42 : 135,724.75 = 55,330.97 : x
  2. Step 2: Convert to fraction form
    98,351.42/135,724.75 = 55,330.97/x
  3. Step 3: Cross multiply
    98,351.42x = 135,724.75 × 55,330.97
  4. Step 4: Simplify right side
    98,351.42x = 7,509,781,253.56
  5. Step 5: Solve for x
    x = 7,509,781,253.56/98,351.42
  6. Step 6: Final answer
    x = 76,356.62

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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.