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Finding the Fourth Proportional to 145.70, 200.91 and 93.92

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Solution

The fourth proportional to 145.70, 200.91 and 93.92 is: 129.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.70 : 200.91 = 93.92 : x
  2. Step 2: Convert to fraction form
    145.70/200.91 = 93.92/x
  3. Step 3: Cross multiply
    145.70x = 200.91 × 93.92
  4. Step 4: Simplify right side
    145.70x = 18,869.47
  5. Step 5: Solve for x
    x = 18,869.47/145.70
  6. Step 6: Final answer
    x = 129.51

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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.