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Finding the Fourth Proportional to 145.02, 201.51 and 143.54

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Solution

The fourth proportional to 145.02, 201.51 and 143.54 is: 199.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.02 : 201.51 = 143.54 : x
  2. Step 2: Convert to fraction form
    145.02/201.51 = 143.54/x
  3. Step 3: Cross multiply
    145.02x = 201.51 × 143.54
  4. Step 4: Simplify right side
    145.02x = 28,923.74
  5. Step 5: Solve for x
    x = 28,923.74/145.02
  6. Step 6: Final answer
    x = 199.45

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.