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Finding the Fourth Proportional to 207,466.80, 311,200.20 and 102,490.80

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Solution

The fourth proportional to 207,466.80, 311,200.20 and 102,490.80 is: 153,736.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,466.80 : 311,200.20 = 102,490.80 : x
  2. Step 2: Convert to fraction form
    207,466.80/311,200.20 = 102,490.80/x
  3. Step 3: Cross multiply
    207,466.80x = 311,200.20 × 102,490.80
  4. Step 4: Simplify right side
    207,466.80x = 31,895,157,458.16
  5. Step 5: Solve for x
    x = 31,895,157,458.16/207,466.80
  6. Step 6: Final answer
    x = 153,736.20

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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.