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Finding the Fourth Proportional to 150.66, 207.99 and 100.89

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Solution

The fourth proportional to 150.66, 207.99 and 100.89 is: 139.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    150.66 : 207.99 = 100.89 : x
  2. Step 2: Convert to fraction form
    150.66/207.99 = 100.89/x
  3. Step 3: Cross multiply
    150.66x = 207.99 × 100.89
  4. Step 4: Simplify right side
    150.66x = 20,984.11
  5. Step 5: Solve for x
    x = 20,984.11/150.66
  6. Step 6: Final answer
    x = 139.28

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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.