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Finding the Fourth Proportional to 60.99, 91.36 and 56.77

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Solution

The fourth proportional to 60.99, 91.36 and 56.77 is: 85.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.99 : 91.36 = 56.77 : x
  2. Step 2: Convert to fraction form
    60.99/91.36 = 56.77/x
  3. Step 3: Cross multiply
    60.99x = 91.36 × 56.77
  4. Step 4: Simplify right side
    60.99x = 5,186.51
  5. Step 5: Solve for x
    x = 5,186.51/60.99
  6. Step 6: Final answer
    x = 85.04

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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.