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Finding the Fourth Proportional to 72.62, 100.23 and 43.51

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Solution

The fourth proportional to 72.62, 100.23 and 43.51 is: 60.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    72.62 : 100.23 = 43.51 : x
  2. Step 2: Convert to fraction form
    72.62/100.23 = 43.51/x
  3. Step 3: Cross multiply
    72.62x = 100.23 × 43.51
  4. Step 4: Simplify right side
    72.62x = 4,360.51
  5. Step 5: Solve for x
    x = 4,360.51/72.62
  6. Step 6: Final answer
    x = 60.05

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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.