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Finding the Fourth Proportional to 228,861.20, 315,839.28 and 142,871.12

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Solution

The fourth proportional to 228,861.20, 315,839.28 and 142,871.12 is: 197,168.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,861.20 : 315,839.28 = 142,871.12 : x
  2. Step 2: Convert to fraction form
    228,861.20/315,839.28 = 142,871.12/x
  3. Step 3: Cross multiply
    228,861.20x = 315,839.28 × 142,871.12
  4. Step 4: Simplify right side
    228,861.20x = 45,124,311,673.59
  5. Step 5: Solve for x
    x = 45,124,311,673.59/228,861.20
  6. Step 6: Final answer
    x = 197,168.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.