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Finding the Fourth Proportional to 68,412, 102,618 and 18,488.27

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Solution

The fourth proportional to 68,412, 102,618 and 18,488.27 is: 27,732.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,412 : 102,618 = 18,488.27 : x
  2. Step 2: Convert to fraction form
    68,412/102,618 = 18,488.27/x
  3. Step 3: Cross multiply
    68,412x = 102,618 × 18,488.27
  4. Step 4: Simplify right side
    68,412x = 1,897,228,777.77
  5. Step 5: Solve for x
    x = 1,897,228,777.77/68,412
  6. Step 6: Final answer
    x = 27,732.40

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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.