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Finding the Fourth Proportional to 88.05, 121.51 and 66.23

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Solution

The fourth proportional to 88.05, 121.51 and 66.23 is: 91.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.05 : 121.51 = 66.23 : x
  2. Step 2: Convert to fraction form
    88.05/121.51 = 66.23/x
  3. Step 3: Cross multiply
    88.05x = 121.51 × 66.23
  4. Step 4: Simplify right side
    88.05x = 8,047.61
  5. Step 5: Solve for x
    x = 8,047.61/88.05
  6. Step 6: Final answer
    x = 91.40

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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.