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Finding the Fourth Proportional to 150.25, 207.26 and 100.40

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Solution

The fourth proportional to 150.25, 207.26 and 100.40 is: 138.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    150.25 : 207.26 = 100.40 : x
  2. Step 2: Convert to fraction form
    150.25/207.26 = 100.40/x
  3. Step 3: Cross multiply
    150.25x = 207.26 × 100.40
  4. Step 4: Simplify right side
    150.25x = 20,808.90
  5. Step 5: Solve for x
    x = 20,808.90/150.25
  6. Step 6: Final answer
    x = 138.50

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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.