Home / 68,498.19-102,732.10-21,105.50

Finding the Fourth Proportional to 68,498.19, 102,732.10 and 21,105.50

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Solution

The fourth proportional to 68,498.19, 102,732.10 and 21,105.50 is: 31,653.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,498.19 : 102,732.10 = 21,105.50 : x
  2. Step 2: Convert to fraction form
    68,498.19/102,732.10 = 21,105.50/x
  3. Step 3: Cross multiply
    68,498.19x = 102,732.10 × 21,105.50
  4. Step 4: Simplify right side
    68,498.19x = 2,168,211,770.13
  5. Step 5: Solve for x
    x = 2,168,211,770.13/68,498.19
  6. Step 6: Final answer
    x = 31,653.56

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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.