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Finding the Fourth Proportional to 70.87, 105.80 and 60.54

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Solution

The fourth proportional to 70.87, 105.80 and 60.54 is: 90.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.87 : 105.80 = 60.54 : x
  2. Step 2: Convert to fraction form
    70.87/105.80 = 60.54/x
  3. Step 3: Cross multiply
    70.87x = 105.80 × 60.54
  4. Step 4: Simplify right side
    70.87x = 6,404.83
  5. Step 5: Solve for x
    x = 6,404.83/70.87
  6. Step 6: Final answer
    x = 90.37

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.