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Finding the Fourth Proportional to 88.66, 122.46 and 64.18

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Solution

The fourth proportional to 88.66, 122.46 and 64.18 is: 88.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.66 : 122.46 = 64.18 : x
  2. Step 2: Convert to fraction form
    88.66/122.46 = 64.18/x
  3. Step 3: Cross multiply
    88.66x = 122.46 × 64.18
  4. Step 4: Simplify right side
    88.66x = 7,859.48
  5. Step 5: Solve for x
    x = 7,859.48/88.66
  6. Step 6: Final answer
    x = 88.65

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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.