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Finding the Fourth Proportional to 207,972.72, 311,985 and 67,693.68

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Solution

The fourth proportional to 207,972.72, 311,985 and 67,693.68 is: 101,548.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,972.72 : 311,985 = 67,693.68 : x
  2. Step 2: Convert to fraction form
    207,972.72/311,985 = 67,693.68/x
  3. Step 3: Cross multiply
    207,972.72x = 311,985 × 67,693.68
  4. Step 4: Simplify right side
    207,972.72x = 21,119,412,754.80
  5. Step 5: Solve for x
    x = 21,119,412,754.80/207,972.72
  6. Step 6: Final answer
    x = 101,548.96

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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.