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Finding the Fourth Proportional to 68.83, 103.36 and 57.50

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Solution

The fourth proportional to 68.83, 103.36 and 57.50 is: 86.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.83 : 103.36 = 57.50 : x
  2. Step 2: Convert to fraction form
    68.83/103.36 = 57.50/x
  3. Step 3: Cross multiply
    68.83x = 103.36 × 57.50
  4. Step 4: Simplify right side
    68.83x = 5,943.17
  5. Step 5: Solve for x
    x = 5,943.17/68.83
  6. Step 6: Final answer
    x = 86.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.