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Finding the Fourth Proportional to 200.16, 300.70 and 142.51

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Solution

The fourth proportional to 200.16, 300.70 and 142.51 is: 214.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.16 : 300.70 = 142.51 : x
  2. Step 2: Convert to fraction form
    200.16/300.70 = 142.51/x
  3. Step 3: Cross multiply
    200.16x = 300.70 × 142.51
  4. Step 4: Simplify right side
    200.16x = 42,852.76
  5. Step 5: Solve for x
    x = 42,852.76/200.16
  6. Step 6: Final answer
    x = 214.09

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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.