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Finding the Fourth Proportional to 69.63, 96.03 and 56.67

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Solution

The fourth proportional to 69.63, 96.03 and 56.67 is: 78.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.63 : 96.03 = 56.67 : x
  2. Step 2: Convert to fraction form
    69.63/96.03 = 56.67/x
  3. Step 3: Cross multiply
    69.63x = 96.03 × 56.67
  4. Step 4: Simplify right side
    69.63x = 5,442.02
  5. Step 5: Solve for x
    x = 5,442.02/69.63
  6. Step 6: Final answer
    x = 78.16

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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.