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Finding the Fourth Proportional to 50.93, 70.23 and 42.72

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Solution

The fourth proportional to 50.93, 70.23 and 42.72 is: 58.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.93 : 70.23 = 42.72 : x
  2. Step 2: Convert to fraction form
    50.93/70.23 = 42.72/x
  3. Step 3: Cross multiply
    50.93x = 70.23 × 42.72
  4. Step 4: Simplify right side
    50.93x = 3,000.23
  5. Step 5: Solve for x
    x = 3,000.23/50.93
  6. Step 6: Final answer
    x = 58.91

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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.