Home / 189,660.57-261,728.46-103,616.70

Finding the Fourth Proportional to 189,660.57, 261,728.46 and 103,616.70

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Solution

The fourth proportional to 189,660.57, 261,728.46 and 103,616.70 is: 142,989.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,660.57 : 261,728.46 = 103,616.70 : x
  2. Step 2: Convert to fraction form
    189,660.57/261,728.46 = 103,616.70/x
  3. Step 3: Cross multiply
    189,660.57x = 261,728.46 × 103,616.70
  4. Step 4: Simplify right side
    189,660.57x = 27,119,439,321.28
  5. Step 5: Solve for x
    x = 27,119,439,321.28/189,660.57
  6. Step 6: Final answer
    x = 142,989.34

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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.