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Finding the Fourth Proportional to 106.31, 146.75 and 67.50

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Solution

The fourth proportional to 106.31, 146.75 and 67.50 is: 93.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    106.31 : 146.75 = 67.50 : x
  2. Step 2: Convert to fraction form
    106.31/146.75 = 67.50/x
  3. Step 3: Cross multiply
    106.31x = 146.75 × 67.50
  4. Step 4: Simplify right side
    106.31x = 9,905.29
  5. Step 5: Solve for x
    x = 9,905.29/106.31
  6. Step 6: Final answer
    x = 93.17

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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.