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Finding the Fourth Proportional to 207,957.12, 311,903.04 and 67,714.56

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Solution

The fourth proportional to 207,957.12, 311,903.04 and 67,714.56 is: 101,561.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,957.12 : 311,903.04 = 67,714.56 : x
  2. Step 2: Convert to fraction form
    207,957.12/311,903.04 = 67,714.56/x
  3. Step 3: Cross multiply
    207,957.12x = 311,903.04 × 67,714.56
  4. Step 4: Simplify right side
    207,957.12x = 21,120,377,116.26
  5. Step 5: Solve for x
    x = 21,120,377,116.26/207,957.12
  6. Step 6: Final answer
    x = 101,561.21

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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.