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Finding the Fourth Proportional to 183.90, 253.50 and 118.32

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Solution

The fourth proportional to 183.90, 253.50 and 118.32 is: 163.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    183.90 : 253.50 = 118.32 : x
  2. Step 2: Convert to fraction form
    183.90/253.50 = 118.32/x
  3. Step 3: Cross multiply
    183.90x = 253.50 × 118.32
  4. Step 4: Simplify right side
    183.90x = 29,994.12
  5. Step 5: Solve for x
    x = 29,994.12/183.90
  6. Step 6: Final answer
    x = 163.10

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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.