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Finding the Fourth Proportional to 98,378.60, 135,759.48 and 55,360.49

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Solution

The fourth proportional to 98,378.60, 135,759.48 and 55,360.49 is: 76,395.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,378.60 : 135,759.48 = 55,360.49 : x
  2. Step 2: Convert to fraction form
    98,378.60/135,759.48 = 55,360.49/x
  3. Step 3: Cross multiply
    98,378.60x = 135,759.48 × 55,360.49
  4. Step 4: Simplify right side
    98,378.60x = 7,515,711,334.95
  5. Step 5: Solve for x
    x = 7,515,711,334.95/98,378.60
  6. Step 6: Final answer
    x = 76,395.79

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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.