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Finding the Fourth Proportional to 145.64, 199.53 and 140.18

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Solution

The fourth proportional to 145.64, 199.53 and 140.18 is: 192.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.64 : 199.53 = 140.18 : x
  2. Step 2: Convert to fraction form
    145.64/199.53 = 140.18/x
  3. Step 3: Cross multiply
    145.64x = 199.53 × 140.18
  4. Step 4: Simplify right side
    145.64x = 27,969.12
  5. Step 5: Solve for x
    x = 27,969.12/145.64
  6. Step 6: Final answer
    x = 192.04

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.