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Finding the Fourth Proportional to 64.19, 95.77 and 54.07

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Solution

The fourth proportional to 64.19, 95.77 and 54.07 is: 80.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.19 : 95.77 = 54.07 : x
  2. Step 2: Convert to fraction form
    64.19/95.77 = 54.07/x
  3. Step 3: Cross multiply
    64.19x = 95.77 × 54.07
  4. Step 4: Simplify right side
    64.19x = 5,178.28
  5. Step 5: Solve for x
    x = 5,178.28/64.19
  6. Step 6: Final answer
    x = 80.67

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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.