Home / 247,905.20-371,857.80-81,671.60

Finding the Fourth Proportional to 247,905.20, 371,857.80 and 81,671.60

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Solution

The fourth proportional to 247,905.20, 371,857.80 and 81,671.60 is: 122,507.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,905.20 : 371,857.80 = 81,671.60 : x
  2. Step 2: Convert to fraction form
    247,905.20/371,857.80 = 81,671.60/x
  3. Step 3: Cross multiply
    247,905.20x = 371,857.80 × 81,671.60
  4. Step 4: Simplify right side
    247,905.20x = 30,370,221,498.48
  5. Step 5: Solve for x
    x = 30,370,221,498.48/247,905.20
  6. Step 6: Final answer
    x = 122,507.40

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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.