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Finding the Fourth Proportional to 90.06, 123.84 and 73.26

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Solution

The fourth proportional to 90.06, 123.84 and 73.26 is: 100.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    90.06 : 123.84 = 73.26 : x
  2. Step 2: Convert to fraction form
    90.06/123.84 = 73.26/x
  3. Step 3: Cross multiply
    90.06x = 123.84 × 73.26
  4. Step 4: Simplify right side
    90.06x = 9,072.52
  5. Step 5: Solve for x
    x = 9,072.52/90.06
  6. Step 6: Final answer
    x = 100.74

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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.