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Finding the Fourth Proportional to 247,807.72, 371,679.66 and 79,313.80

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Solution

The fourth proportional to 247,807.72, 371,679.66 and 79,313.80 is: 118,960.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,807.72 : 371,679.66 = 79,313.80 : x
  2. Step 2: Convert to fraction form
    247,807.72/371,679.66 = 79,313.80/x
  3. Step 3: Cross multiply
    247,807.72x = 371,679.66 × 79,313.80
  4. Step 4: Simplify right side
    247,807.72x = 29,479,326,217.31
  5. Step 5: Solve for x
    x = 29,479,326,217.31/247,807.72
  6. Step 6: Final answer
    x = 118,960.48

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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.