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Finding the Fourth Proportional to 247,455.07, 371,178.05 and 78,974.06

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Solution

The fourth proportional to 247,455.07, 371,178.05 and 78,974.06 is: 118,459.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,455.07 : 371,178.05 = 78,974.06 : x
  2. Step 2: Convert to fraction form
    247,455.07/371,178.05 = 78,974.06/x
  3. Step 3: Cross multiply
    247,455.07x = 371,178.05 × 78,974.06
  4. Step 4: Simplify right side
    247,455.07x = 29,313,435,340.62
  5. Step 5: Solve for x
    x = 29,313,435,340.62/247,455.07
  6. Step 6: Final answer
    x = 118,459.63

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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.