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Finding the Fourth Proportional to 59.93, 90.20 and 42.92

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Solution

The fourth proportional to 59.93, 90.20 and 42.92 is: 64.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    59.93 : 90.20 = 42.92 : x
  2. Step 2: Convert to fraction form
    59.93/90.20 = 42.92/x
  3. Step 3: Cross multiply
    59.93x = 90.20 × 42.92
  4. Step 4: Simplify right side
    59.93x = 3,871.38
  5. Step 5: Solve for x
    x = 3,871.38/59.93
  6. Step 6: Final answer
    x = 64.60

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.