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Finding the Fourth Proportional to 247,392, 371,260.80 and 99,648

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Solution

The fourth proportional to 247,392, 371,260.80 and 99,648 is: 149,541.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,392 : 371,260.80 = 99,648 : x
  2. Step 2: Convert to fraction form
    247,392/371,260.80 = 99,648/x
  3. Step 3: Cross multiply
    247,392x = 371,260.80 × 99,648
  4. Step 4: Simplify right side
    247,392x = 36,995,396,198.40
  5. Step 5: Solve for x
    x = 36,995,396,198.40/247,392
  6. Step 6: Final answer
    x = 149,541.60

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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.