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Finding the Fourth Proportional to 115,710.75, 159,395.40 and 98,659.44

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Solution

The fourth proportional to 115,710.75, 159,395.40 and 98,659.44 is: 135,906.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,710.75 : 159,395.40 = 98,659.44 : x
  2. Step 2: Convert to fraction form
    115,710.75/159,395.40 = 98,659.44/x
  3. Step 3: Cross multiply
    115,710.75x = 159,395.40 × 98,659.44
  4. Step 4: Simplify right side
    115,710.75x = 15,725,860,902.58
  5. Step 5: Solve for x
    x = 15,725,860,902.58/115,710.75
  6. Step 6: Final answer
    x = 135,906.65

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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.