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Finding the Fourth Proportional to 68.07, 101.55 and 57.81

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Solution

The fourth proportional to 68.07, 101.55 and 57.81 is: 86.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.07 : 101.55 = 57.81 : x
  2. Step 2: Convert to fraction form
    68.07/101.55 = 57.81/x
  3. Step 3: Cross multiply
    68.07x = 101.55 × 57.81
  4. Step 4: Simplify right side
    68.07x = 5,870.61
  5. Step 5: Solve for x
    x = 5,870.61/68.07
  6. Step 6: Final answer
    x = 86.24

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.