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Finding the Fourth Proportional to 150.85, 207.72 and 139.96

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Solution

The fourth proportional to 150.85, 207.72 and 139.96 is: 192.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    150.85 : 207.72 = 139.96 : x
  2. Step 2: Convert to fraction form
    150.85/207.72 = 139.96/x
  3. Step 3: Cross multiply
    150.85x = 207.72 × 139.96
  4. Step 4: Simplify right side
    150.85x = 29,070.75
  5. Step 5: Solve for x
    x = 29,070.75/150.85
  6. Step 6: Final answer
    x = 192.72

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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.