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Finding the Fourth Proportional to 60.55, 90.34 and 51.89

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Solution

The fourth proportional to 60.55, 90.34 and 51.89 is: 77.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.55 : 90.34 = 51.89 : x
  2. Step 2: Convert to fraction form
    60.55/90.34 = 51.89/x
  3. Step 3: Cross multiply
    60.55x = 90.34 × 51.89
  4. Step 4: Simplify right side
    60.55x = 4,687.74
  5. Step 5: Solve for x
    x = 4,687.74/60.55
  6. Step 6: Final answer
    x = 77.42

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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.