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Finding the Fourth Proportional to 145.97, 219.05 and 64.81

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Solution

The fourth proportional to 145.97, 219.05 and 64.81 is: 97.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.97 : 219.05 = 64.81 : x
  2. Step 2: Convert to fraction form
    145.97/219.05 = 64.81/x
  3. Step 3: Cross multiply
    145.97x = 219.05 × 64.81
  4. Step 4: Simplify right side
    145.97x = 14,195.21
  5. Step 5: Solve for x
    x = 14,195.21/145.97
  6. Step 6: Final answer
    x = 97.25

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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.