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Finding the Fourth Proportional to 97.07, 146.14 and 89.91

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Solution

The fourth proportional to 97.07, 146.14 and 89.91 is: 135.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.07 : 146.14 = 89.91 : x
  2. Step 2: Convert to fraction form
    97.07/146.14 = 89.91/x
  3. Step 3: Cross multiply
    97.07x = 146.14 × 89.91
  4. Step 4: Simplify right side
    97.07x = 13,139.22
  5. Step 5: Solve for x
    x = 13,139.22/97.07
  6. Step 6: Final answer
    x = 135.37

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.