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Finding the Fourth Proportional to 55.78, 77.01 and 35.08

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Solution

The fourth proportional to 55.78, 77.01 and 35.08 is: 48.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.78 : 77.01 = 35.08 : x
  2. Step 2: Convert to fraction form
    55.78/77.01 = 35.08/x
  3. Step 3: Cross multiply
    55.78x = 77.01 × 35.08
  4. Step 4: Simplify right side
    55.78x = 2,701.51
  5. Step 5: Solve for x
    x = 2,701.51/55.78
  6. Step 6: Final answer
    x = 48.43

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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.