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Finding the Fourth Proportional to 150.70, 207.96 and 84.31

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Solution

The fourth proportional to 150.70, 207.96 and 84.31 is: 116.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    150.70 : 207.96 = 84.31 : x
  2. Step 2: Convert to fraction form
    150.70/207.96 = 84.31/x
  3. Step 3: Cross multiply
    150.70x = 207.96 × 84.31
  4. Step 4: Simplify right side
    150.70x = 17,532.98
  5. Step 5: Solve for x
    x = 17,532.98/150.70
  6. Step 6: Final answer
    x = 116.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.