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Finding the Fourth Proportional to 145.80, 200.95 and 108.95

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Solution

The fourth proportional to 145.80, 200.95 and 108.95 is: 150.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.80 : 200.95 = 108.95 : x
  2. Step 2: Convert to fraction form
    145.80/200.95 = 108.95/x
  3. Step 3: Cross multiply
    145.80x = 200.95 × 108.95
  4. Step 4: Simplify right side
    145.80x = 21,892.23
  5. Step 5: Solve for x
    x = 21,892.23/145.80
  6. Step 6: Final answer
    x = 150.15

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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.