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Finding the Fourth Proportional to 98,479.32, 135,855 and 71,610

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Solution

The fourth proportional to 98,479.32, 135,855 and 71,610 is: 98,788.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,479.32 : 135,855 = 71,610 : x
  2. Step 2: Convert to fraction form
    98,479.32/135,855 = 71,610/x
  3. Step 3: Cross multiply
    98,479.32x = 135,855 × 71,610
  4. Step 4: Simplify right side
    98,479.32x = 9,728,576,550
  5. Step 5: Solve for x
    x = 9,728,576,550/98,479.32
  6. Step 6: Final answer
    x = 98,788.02

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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.