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Finding the Fourth Proportional to 56.86, 77.99 and 55.60

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Solution

The fourth proportional to 56.86, 77.99 and 55.60 is: 76.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.86 : 77.99 = 55.60 : x
  2. Step 2: Convert to fraction form
    56.86/77.99 = 55.60/x
  3. Step 3: Cross multiply
    56.86x = 77.99 × 55.60
  4. Step 4: Simplify right side
    56.86x = 4,336.24
  5. Step 5: Solve for x
    x = 4,336.24/56.86
  6. Step 6: Final answer
    x = 76.26

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.