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Finding the Fourth Proportional to 207,776.80, 311,665.20 and 89,581.60

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Solution

The fourth proportional to 207,776.80, 311,665.20 and 89,581.60 is: 134,372.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,776.80 : 311,665.20 = 89,581.60 : x
  2. Step 2: Convert to fraction form
    207,776.80/311,665.20 = 89,581.60/x
  3. Step 3: Cross multiply
    207,776.80x = 311,665.20 × 89,581.60
  4. Step 4: Simplify right side
    207,776.80x = 27,919,467,280.32
  5. Step 5: Solve for x
    x = 27,919,467,280.32/207,776.80
  6. Step 6: Final answer
    x = 134,372.40

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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.