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Finding the Fourth Proportional to 98,480.28, 135,855.30 and 64,473.72

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Solution

The fourth proportional to 98,480.28, 135,855.30 and 64,473.72 is: 88,942.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,480.28 : 135,855.30 = 64,473.72 : x
  2. Step 2: Convert to fraction form
    98,480.28/135,855.30 = 64,473.72/x
  3. Step 3: Cross multiply
    98,480.28x = 135,855.30 × 64,473.72
  4. Step 4: Simplify right side
    98,480.28x = 8,759,096,572.72
  5. Step 5: Solve for x
    x = 8,759,096,572.72/98,480.28
  6. Step 6: Final answer
    x = 88,942.64

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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.