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Finding the Fourth Proportional to 98,396.45, 135,785.60 and 54,788.71

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Solution

The fourth proportional to 98,396.45, 135,785.60 and 54,788.71 is: 75,607.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,396.45 : 135,785.60 = 54,788.71 : x
  2. Step 2: Convert to fraction form
    98,396.45/135,785.60 = 54,788.71/x
  3. Step 3: Cross multiply
    98,396.45x = 135,785.60 × 54,788.71
  4. Step 4: Simplify right side
    98,396.45x = 7,439,517,300.83
  5. Step 5: Solve for x
    x = 7,439,517,300.83/98,396.45
  6. Step 6: Final answer
    x = 75,607.58

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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.