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Finding the Fourth Proportional to 145.00, 200.08 and 79.49

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Solution

The fourth proportional to 145.00, 200.08 and 79.49 is: 109.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.00 : 200.08 = 79.49 : x
  2. Step 2: Convert to fraction form
    145.00/200.08 = 79.49/x
  3. Step 3: Cross multiply
    145.00x = 200.08 × 79.49
  4. Step 4: Simplify right side
    145.00x = 15,903.36
  5. Step 5: Solve for x
    x = 15,903.36/145.00
  6. Step 6: Final answer
    x = 109.68

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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.