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Finding the Fourth Proportional to 128,439.28, 192,639.48 and 34,952.32

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Solution

The fourth proportional to 128,439.28, 192,639.48 and 34,952.32 is: 52,423.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,439.28 : 192,639.48 = 34,952.32 : x
  2. Step 2: Convert to fraction form
    128,439.28/192,639.48 = 34,952.32/x
  3. Step 3: Cross multiply
    128,439.28x = 192,639.48 × 34,952.32
  4. Step 4: Simplify right side
    128,439.28x = 6,733,196,749.59
  5. Step 5: Solve for x
    x = 6,733,196,749.59/128,439.28
  6. Step 6: Final answer
    x = 52,423.19

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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.