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Finding the Fourth Proportional to 230,616.28, 318,238.32 and 128,652.40

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Solution

The fourth proportional to 230,616.28, 318,238.32 and 128,652.40 is: 177,533.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,616.28 : 318,238.32 = 128,652.40 : x
  2. Step 2: Convert to fraction form
    230,616.28/318,238.32 = 128,652.40/x
  3. Step 3: Cross multiply
    230,616.28x = 318,238.32 × 128,652.40
  4. Step 4: Simplify right side
    230,616.28x = 40,942,123,639.97
  5. Step 5: Solve for x
    x = 40,942,123,639.97/230,616.28
  6. Step 6: Final answer
    x = 177,533.54

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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.