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Finding the Fourth Proportional to 207,260.70, 311,121.45 and 128,463.90

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Solution

The fourth proportional to 207,260.70, 311,121.45 and 128,463.90 is: 192,838.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,260.70 : 311,121.45 = 128,463.90 : x
  2. Step 2: Convert to fraction form
    207,260.70/311,121.45 = 128,463.90/x
  3. Step 3: Cross multiply
    207,260.70x = 311,121.45 × 128,463.90
  4. Step 4: Simplify right side
    207,260.70x = 39,967,874,840.66
  5. Step 5: Solve for x
    x = 39,967,874,840.66/207,260.70
  6. Step 6: Final answer
    x = 192,838.66

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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.