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Finding the Fourth Proportional to 97.07, 145.57 and 28.57

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Solution

The fourth proportional to 97.07, 145.57 and 28.57 is: 42.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.07 : 145.57 = 28.57 : x
  2. Step 2: Convert to fraction form
    97.07/145.57 = 28.57/x
  3. Step 3: Cross multiply
    97.07x = 145.57 × 28.57
  4. Step 4: Simplify right side
    97.07x = 4,159.37
  5. Step 5: Solve for x
    x = 4,159.37/97.07
  6. Step 6: Final answer
    x = 42.85

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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.