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Finding the Fourth Proportional to 71,639.76, 98,911.08 and 64,062.48

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Solution

The fourth proportional to 71,639.76, 98,911.08 and 64,062.48 is: 88,449.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,639.76 : 98,911.08 = 64,062.48 : x
  2. Step 2: Convert to fraction form
    71,639.76/98,911.08 = 64,062.48/x
  3. Step 3: Cross multiply
    71,639.76x = 98,911.08 × 64,062.48
  4. Step 4: Simplify right side
    71,639.76x = 6,336,489,084.28
  5. Step 5: Solve for x
    x = 6,336,489,084.28/71,639.76
  6. Step 6: Final answer
    x = 88,449.33

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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.