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Finding the Fourth Proportional to 145.51, 200.70 and 108.62

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Solution

The fourth proportional to 145.51, 200.70 and 108.62 is: 149.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.51 : 200.70 = 108.62 : x
  2. Step 2: Convert to fraction form
    145.51/200.70 = 108.62/x
  3. Step 3: Cross multiply
    145.51x = 200.70 × 108.62
  4. Step 4: Simplify right side
    145.51x = 21,800.03
  5. Step 5: Solve for x
    x = 21,800.03/145.51
  6. Step 6: Final answer
    x = 149.82

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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.