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Finding the Fourth Proportional to 53.51, 80.22 and 42.06

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Solution

The fourth proportional to 53.51, 80.22 and 42.06 is: 63.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    53.51 : 80.22 = 42.06 : x
  2. Step 2: Convert to fraction form
    53.51/80.22 = 42.06/x
  3. Step 3: Cross multiply
    53.51x = 80.22 × 42.06
  4. Step 4: Simplify right side
    53.51x = 3,374.21
  5. Step 5: Solve for x
    x = 3,374.21/53.51
  6. Step 6: Final answer
    x = 63.05

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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.