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Finding the Fourth Proportional to 147.84, 220.51 and 143.51

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Solution

The fourth proportional to 147.84, 220.51 and 143.51 is: 214.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.84 : 220.51 = 143.51 : x
  2. Step 2: Convert to fraction form
    147.84/220.51 = 143.51/x
  3. Step 3: Cross multiply
    147.84x = 220.51 × 143.51
  4. Step 4: Simplify right side
    147.84x = 31,645.39
  5. Step 5: Solve for x
    x = 31,645.39/147.84
  6. Step 6: Final answer
    x = 214.05

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.