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Finding the Fourth Proportional to 68.62, 94.58 and 56.20

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Solution

The fourth proportional to 68.62, 94.58 and 56.20 is: 77.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.62 : 94.58 = 56.20 : x
  2. Step 2: Convert to fraction form
    68.62/94.58 = 56.20/x
  3. Step 3: Cross multiply
    68.62x = 94.58 × 56.20
  4. Step 4: Simplify right side
    68.62x = 5,315.40
  5. Step 5: Solve for x
    x = 5,315.40/68.62
  6. Step 6: Final answer
    x = 77.46

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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.