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Finding the Fourth Proportional to 72,639.38, 108,969.47 and 35,168.69

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Solution

The fourth proportional to 72,639.38, 108,969.47 and 35,168.69 is: 52,758.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,639.38 : 108,969.47 = 35,168.69 : x
  2. Step 2: Convert to fraction form
    72,639.38/108,969.47 = 35,168.69/x
  3. Step 3: Cross multiply
    72,639.38x = 108,969.47 × 35,168.69
  4. Step 4: Simplify right side
    72,639.38x = 3,832,313,738.36
  5. Step 5: Solve for x
    x = 3,832,313,738.36/72,639.38
  6. Step 6: Final answer
    x = 52,758.07

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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.