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Finding the Fourth Proportional to 60.22, 90.79 and 56.89

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Solution

The fourth proportional to 60.22, 90.79 and 56.89 is: 85.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.22 : 90.79 = 56.89 : x
  2. Step 2: Convert to fraction form
    60.22/90.79 = 56.89/x
  3. Step 3: Cross multiply
    60.22x = 90.79 × 56.89
  4. Step 4: Simplify right side
    60.22x = 5,165.04
  5. Step 5: Solve for x
    x = 5,165.04/60.22
  6. Step 6: Final answer
    x = 85.77

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.