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Finding the Fourth Proportional to 64.01, 88.11 and 55.81

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Solution

The fourth proportional to 64.01, 88.11 and 55.81 is: 76.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.01 : 88.11 = 55.81 : x
  2. Step 2: Convert to fraction form
    64.01/88.11 = 55.81/x
  3. Step 3: Cross multiply
    64.01x = 88.11 × 55.81
  4. Step 4: Simplify right side
    64.01x = 4,917.13
  5. Step 5: Solve for x
    x = 4,917.13/64.01
  6. Step 6: Final answer
    x = 76.82

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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.