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Finding the Fourth Proportional to 85.36, 117.64 and 67

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Solution

The fourth proportional to 85.36, 117.64 and 67 is: 92.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    85.36 : 117.64 = 67 : x
  2. Step 2: Convert to fraction form
    85.36/117.64 = 67/x
  3. Step 3: Cross multiply
    85.36x = 117.64 × 67
  4. Step 4: Simplify right side
    85.36x = 7,881.88
  5. Step 5: Solve for x
    x = 7,881.88/85.36
  6. Step 6: Final answer
    x = 92.34

Related Problems

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1.5x scale

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.