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Finding the Fourth Proportional to 61.46, 91.94 and 51.74

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Solution

The fourth proportional to 61.46, 91.94 and 51.74 is: 77.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.46 : 91.94 = 51.74 : x
  2. Step 2: Convert to fraction form
    61.46/91.94 = 51.74/x
  3. Step 3: Cross multiply
    61.46x = 91.94 × 51.74
  4. Step 4: Simplify right side
    61.46x = 4,756.60
  5. Step 5: Solve for x
    x = 4,756.60/61.46
  6. Step 6: Final answer
    x = 77.40

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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.