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Finding the Fourth Proportional to 68,459.88, 102,704.22 and 38,891.40

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Solution

The fourth proportional to 68,459.88, 102,704.22 and 38,891.40 is: 58,345.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,459.88 : 102,704.22 = 38,891.40 : x
  2. Step 2: Convert to fraction form
    68,459.88/102,704.22 = 38,891.40/x
  3. Step 3: Cross multiply
    68,459.88x = 102,704.22 × 38,891.40
  4. Step 4: Simplify right side
    68,459.88x = 3,994,310,901.71
  5. Step 5: Solve for x
    x = 3,994,310,901.71/68,459.88
  6. Step 6: Final answer
    x = 58,345.28

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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.