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Finding the Fourth Proportional to 123.18, 170 and 74.07

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Solution

The fourth proportional to 123.18, 170 and 74.07 is: 102.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    123.18 : 170 = 74.07 : x
  2. Step 2: Convert to fraction form
    123.18/170 = 74.07/x
  3. Step 3: Cross multiply
    123.18x = 170 × 74.07
  4. Step 4: Simplify right side
    123.18x = 12,591.90
  5. Step 5: Solve for x
    x = 12,591.90/123.18
  6. Step 6: Final answer
    x = 102.22

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