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Finding the Fourth Proportional to 55.08, 75.87 and 51.89

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Solution

The fourth proportional to 55.08, 75.87 and 51.89 is: 71.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.08 : 75.87 = 51.89 : x
  2. Step 2: Convert to fraction form
    55.08/75.87 = 51.89/x
  3. Step 3: Cross multiply
    55.08x = 75.87 × 51.89
  4. Step 4: Simplify right side
    55.08x = 3,936.51
  5. Step 5: Solve for x
    x = 3,936.51/55.08
  6. Step 6: Final answer
    x = 71.47

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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.