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Finding the Fourth Proportional to 60.71, 90.74 and 55.85

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Solution

The fourth proportional to 60.71, 90.74 and 55.85 is: 83.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.71 : 90.74 = 55.85 : x
  2. Step 2: Convert to fraction form
    60.71/90.74 = 55.85/x
  3. Step 3: Cross multiply
    60.71x = 90.74 × 55.85
  4. Step 4: Simplify right side
    60.71x = 5,067.51
  5. Step 5: Solve for x
    x = 5,067.51/60.71
  6. Step 6: Final answer
    x = 83.48

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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.