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Finding the Fourth Proportional to 145.08, 199.80 and 131.31

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Solution

The fourth proportional to 145.08, 199.80 and 131.31 is: 180.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.08 : 199.80 = 131.31 : x
  2. Step 2: Convert to fraction form
    145.08/199.80 = 131.31/x
  3. Step 3: Cross multiply
    145.08x = 199.80 × 131.31
  4. Step 4: Simplify right side
    145.08x = 26,235.74
  5. Step 5: Solve for x
    x = 26,235.74/145.08
  6. Step 6: Final answer
    x = 180.84

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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.