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Finding the Fourth Proportional to 55.29, 75.84 and 53.94

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Solution

The fourth proportional to 55.29, 75.84 and 53.94 is: 73.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.29 : 75.84 = 53.94 : x
  2. Step 2: Convert to fraction form
    55.29/75.84 = 53.94/x
  3. Step 3: Cross multiply
    55.29x = 75.84 × 53.94
  4. Step 4: Simplify right side
    55.29x = 4,090.81
  5. Step 5: Solve for x
    x = 4,090.81/55.29
  6. Step 6: Final answer
    x = 73.99

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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.