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Finding the Fourth Proportional to 68,627.40, 102,944.77 and 21,275.21

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Solution

The fourth proportional to 68,627.40, 102,944.77 and 21,275.21 is: 31,913.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,627.40 : 102,944.77 = 21,275.21 : x
  2. Step 2: Convert to fraction form
    68,627.40/102,944.77 = 21,275.21/x
  3. Step 3: Cross multiply
    68,627.40x = 102,944.77 × 21,275.21
  4. Step 4: Simplify right side
    68,627.40x = 2,190,171,344.93
  5. Step 5: Solve for x
    x = 2,190,171,344.93/68,627.40
  6. Step 6: Final answer
    x = 31,913.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.