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Finding the Fourth Proportional to 145.65, 200.97 and 104.28

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Solution

The fourth proportional to 145.65, 200.97 and 104.28 is: 143.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.65 : 200.97 = 104.28 : x
  2. Step 2: Convert to fraction form
    145.65/200.97 = 104.28/x
  3. Step 3: Cross multiply
    145.65x = 200.97 × 104.28
  4. Step 4: Simplify right side
    145.65x = 20,957.15
  5. Step 5: Solve for x
    x = 20,957.15/145.65
  6. Step 6: Final answer
    x = 143.89

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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.