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Finding the Fourth Proportional to 68,708.10, 103,062.15 and 21,323.10

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Solution

The fourth proportional to 68,708.10, 103,062.15 and 21,323.10 is: 31,984.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,708.10 : 103,062.15 = 21,323.10 : x
  2. Step 2: Convert to fraction form
    68,708.10/103,062.15 = 21,323.10/x
  3. Step 3: Cross multiply
    68,708.10x = 103,062.15 × 21,323.10
  4. Step 4: Simplify right side
    68,708.10x = 2,197,604,530.67
  5. Step 5: Solve for x
    x = 2,197,604,530.67/68,708.10
  6. Step 6: Final answer
    x = 31,984.65

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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.