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Finding the Fourth Proportional to 145.73, 201.11 and 90.47

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Solution

The fourth proportional to 145.73, 201.11 and 90.47 is: 124.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.73 : 201.11 = 90.47 : x
  2. Step 2: Convert to fraction form
    145.73/201.11 = 90.47/x
  3. Step 3: Cross multiply
    145.73x = 201.11 × 90.47
  4. Step 4: Simplify right side
    145.73x = 18,192.96
  5. Step 5: Solve for x
    x = 18,192.96/145.73
  6. Step 6: Final answer
    x = 124.84

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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.