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Finding the Fourth Proportional to 68,344.40, 102,516.60 and 31,480.40

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Solution

The fourth proportional to 68,344.40, 102,516.60 and 31,480.40 is: 47,220.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,344.40 : 102,516.60 = 31,480.40 : x
  2. Step 2: Convert to fraction form
    68,344.40/102,516.60 = 31,480.40/x
  3. Step 3: Cross multiply
    68,344.40x = 102,516.60 × 31,480.40
  4. Step 4: Simplify right side
    68,344.40x = 3,227,263,574.64
  5. Step 5: Solve for x
    x = 3,227,263,574.64/68,344.40
  6. Step 6: Final answer
    x = 47,220.60

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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.