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Finding the Fourth Proportional to 61.51, 91.56 and 60.64

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Solution

The fourth proportional to 61.51, 91.56 and 60.64 is: 90.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.51 : 91.56 = 60.64 : x
  2. Step 2: Convert to fraction form
    61.51/91.56 = 60.64/x
  3. Step 3: Cross multiply
    61.51x = 91.56 × 60.64
  4. Step 4: Simplify right side
    61.51x = 5,551.44
  5. Step 5: Solve for x
    x = 5,551.44/61.51
  6. Step 6: Final answer
    x = 90.26

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.