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Finding the Fourth Proportional to 145.71, 218.70 and 94.20

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Solution

The fourth proportional to 145.71, 218.70 and 94.20 is: 141.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.71 : 218.70 = 94.20 : x
  2. Step 2: Convert to fraction form
    145.71/218.70 = 94.20/x
  3. Step 3: Cross multiply
    145.71x = 218.70 × 94.20
  4. Step 4: Simplify right side
    145.71x = 20,601.54
  5. Step 5: Solve for x
    x = 20,601.54/145.71
  6. Step 6: Final answer
    x = 141.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.