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Finding the Fourth Proportional to 98,908.56, 136,419.40 and 68,693.92

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Solution

The fourth proportional to 98,908.56, 136,419.40 and 68,693.92 is: 94,745.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,908.56 : 136,419.40 = 68,693.92 : x
  2. Step 2: Convert to fraction form
    98,908.56/136,419.40 = 68,693.92/x
  3. Step 3: Cross multiply
    98,908.56x = 136,419.40 × 68,693.92
  4. Step 4: Simplify right side
    98,908.56x = 9,371,183,350.05
  5. Step 5: Solve for x
    x = 9,371,183,350.05/98,908.56
  6. Step 6: Final answer
    x = 94,745.93

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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.