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Finding the Fourth Proportional to 151.35, 208.73 and 89.19

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Solution

The fourth proportional to 151.35, 208.73 and 89.19 is: 123.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.35 : 208.73 = 89.19 : x
  2. Step 2: Convert to fraction form
    151.35/208.73 = 89.19/x
  3. Step 3: Cross multiply
    151.35x = 208.73 × 89.19
  4. Step 4: Simplify right side
    151.35x = 18,616.18
  5. Step 5: Solve for x
    x = 18,616.18/151.35
  6. Step 6: Final answer
    x = 123.00

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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.