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Finding the Fourth Proportional to 64.18, 95.86 and 61.35

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Solution

The fourth proportional to 64.18, 95.86 and 61.35 is: 91.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.18 : 95.86 = 61.35 : x
  2. Step 2: Convert to fraction form
    64.18/95.86 = 61.35/x
  3. Step 3: Cross multiply
    64.18x = 95.86 × 61.35
  4. Step 4: Simplify right side
    64.18x = 5,881.01
  5. Step 5: Solve for x
    x = 5,881.01/64.18
  6. Step 6: Final answer
    x = 91.63

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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.