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Finding the Fourth Proportional to 55.08, 75.93 and 42.77

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Solution

The fourth proportional to 55.08, 75.93 and 42.77 is: 58.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.08 : 75.93 = 42.77 : x
  2. Step 2: Convert to fraction form
    55.08/75.93 = 42.77/x
  3. Step 3: Cross multiply
    55.08x = 75.93 × 42.77
  4. Step 4: Simplify right side
    55.08x = 3,247.15
  5. Step 5: Solve for x
    x = 3,247.15/55.08
  6. Step 6: Final answer
    x = 58.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.