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Finding the Fourth Proportional to 207,616.10, 311,424.15 and 102,640.10

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Solution

The fourth proportional to 207,616.10, 311,424.15 and 102,640.10 is: 153,960.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,616.10 : 311,424.15 = 102,640.10 : x
  2. Step 2: Convert to fraction form
    207,616.10/311,424.15 = 102,640.10/x
  3. Step 3: Cross multiply
    207,616.10x = 311,424.15 × 102,640.10
  4. Step 4: Simplify right side
    207,616.10x = 31,964,605,898.42
  5. Step 5: Solve for x
    x = 31,964,605,898.42/207,616.10
  6. Step 6: Final answer
    x = 153,960.15

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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.