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Finding the Fourth Proportional to 97.31, 145.99 and 45.93

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Solution

The fourth proportional to 97.31, 145.99 and 45.93 is: 68.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.31 : 145.99 = 45.93 : x
  2. Step 2: Convert to fraction form
    97.31/145.99 = 45.93/x
  3. Step 3: Cross multiply
    97.31x = 145.99 × 45.93
  4. Step 4: Simplify right side
    97.31x = 6,704.59
  5. Step 5: Solve for x
    x = 6,704.59/97.31
  6. Step 6: Final answer
    x = 68.90

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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.