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Finding the Fourth Proportional to 68,988.30, 103,401.45 and 68,249.58

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Solution

The fourth proportional to 68,988.30, 103,401.45 and 68,249.58 is: 102,294.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,988.30 : 103,401.45 = 68,249.58 : x
  2. Step 2: Convert to fraction form
    68,988.30/103,401.45 = 68,249.58/x
  3. Step 3: Cross multiply
    68,988.30x = 103,401.45 × 68,249.58
  4. Step 4: Simplify right side
    68,988.30x = 7,057,105,533.89
  5. Step 5: Solve for x
    x = 7,057,105,533.89/68,988.30
  6. Step 6: Final answer
    x = 102,294.24

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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.