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Finding the Fourth Proportional to 97.36, 145.80 and 73.28

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Solution

The fourth proportional to 97.36, 145.80 and 73.28 is: 109.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.36 : 145.80 = 73.28 : x
  2. Step 2: Convert to fraction form
    97.36/145.80 = 73.28/x
  3. Step 3: Cross multiply
    97.36x = 145.80 × 73.28
  4. Step 4: Simplify right side
    97.36x = 10,684.22
  5. Step 5: Solve for x
    x = 10,684.22/97.36
  6. Step 6: Final answer
    x = 109.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.