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Finding the Fourth Proportional to 115,288.20, 172,932.30 and 91,960.20

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Solution

The fourth proportional to 115,288.20, 172,932.30 and 91,960.20 is: 137,940.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,288.20 : 172,932.30 = 91,960.20 : x
  2. Step 2: Convert to fraction form
    115,288.20/172,932.30 = 91,960.20/x
  3. Step 3: Cross multiply
    115,288.20x = 172,932.30 × 91,960.20
  4. Step 4: Simplify right side
    115,288.20x = 15,902,888,894.46
  5. Step 5: Solve for x
    x = 15,902,888,894.46/115,288.20
  6. Step 6: Final answer
    x = 137,940.30

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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.