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Finding the Fourth Proportional to 207,861.20, 311,791.80 and 144,875.60

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Solution

The fourth proportional to 207,861.20, 311,791.80 and 144,875.60 is: 217,313.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,861.20 : 311,791.80 = 144,875.60 : x
  2. Step 2: Convert to fraction form
    207,861.20/311,791.80 = 144,875.60/x
  3. Step 3: Cross multiply
    207,861.20x = 311,791.80 × 144,875.60
  4. Step 4: Simplify right side
    207,861.20x = 45,171,024,100.08
  5. Step 5: Solve for x
    x = 45,171,024,100.08/207,861.20
  6. Step 6: Final answer
    x = 217,313.40

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1.5x scale

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.