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Finding the Fourth Proportional to 147.83, 203.99 and 85.69

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Solution

The fourth proportional to 147.83, 203.99 and 85.69 is: 118.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.83 : 203.99 = 85.69 : x
  2. Step 2: Convert to fraction form
    147.83/203.99 = 85.69/x
  3. Step 3: Cross multiply
    147.83x = 203.99 × 85.69
  4. Step 4: Simplify right side
    147.83x = 17,479.73
  5. Step 5: Solve for x
    x = 17,479.73/147.83
  6. Step 6: Final answer
    x = 118.25

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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.