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Finding the Fourth Proportional to 247,384.80, 371,028.60 and 81,172.80

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Solution

The fourth proportional to 247,384.80, 371,028.60 and 81,172.80 is: 121,743.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,384.80 : 371,028.60 = 81,172.80 : x
  2. Step 2: Convert to fraction form
    247,384.80/371,028.60 = 81,172.80/x
  3. Step 3: Cross multiply
    247,384.80x = 371,028.60 × 81,172.80
  4. Step 4: Simplify right side
    247,384.80x = 30,117,430,342.08
  5. Step 5: Solve for x
    x = 30,117,430,342.08/247,384.80
  6. Step 6: Final answer
    x = 121,743.25

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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.