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Finding the Fourth Proportional to 146.93, 220.35 and 65.81

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Solution

The fourth proportional to 146.93, 220.35 and 65.81 is: 98.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.93 : 220.35 = 65.81 : x
  2. Step 2: Convert to fraction form
    146.93/220.35 = 65.81/x
  3. Step 3: Cross multiply
    146.93x = 220.35 × 65.81
  4. Step 4: Simplify right side
    146.93x = 14,501.23
  5. Step 5: Solve for x
    x = 14,501.23/146.93
  6. Step 6: Final answer
    x = 98.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.