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Finding the Fourth Proportional to 128,399.63, 192,599.46 and 34,905.38

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Solution

The fourth proportional to 128,399.63, 192,599.46 and 34,905.38 is: 52,358.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,399.63 : 192,599.46 = 34,905.38 : x
  2. Step 2: Convert to fraction form
    128,399.63/192,599.46 = 34,905.38/x
  3. Step 3: Cross multiply
    128,399.63x = 192,599.46 × 34,905.38
  4. Step 4: Simplify right side
    128,399.63x = 6,722,756,376.10
  5. Step 5: Solve for x
    x = 6,722,756,376.10/128,399.63
  6. Step 6: Final answer
    x = 52,358.07

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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.