Home / 247,979.20-371,968.80-81,745.60

Finding the Fourth Proportional to 247,979.20, 371,968.80 and 81,745.60

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Solution

The fourth proportional to 247,979.20, 371,968.80 and 81,745.60 is: 122,618.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,979.20 : 371,968.80 = 81,745.60 : x
  2. Step 2: Convert to fraction form
    247,979.20/371,968.80 = 81,745.60/x
  3. Step 3: Cross multiply
    247,979.20x = 371,968.80 × 81,745.60
  4. Step 4: Simplify right side
    247,979.20x = 30,406,812,737.28
  5. Step 5: Solve for x
    x = 30,406,812,737.28/247,979.20
  6. Step 6: Final answer
    x = 122,618.40

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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.