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Finding the Fourth Proportional to 77.55, 106.92 and 52.95

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Solution

The fourth proportional to 77.55, 106.92 and 52.95 is: 73.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    77.55 : 106.92 = 52.95 : x
  2. Step 2: Convert to fraction form
    77.55/106.92 = 52.95/x
  3. Step 3: Cross multiply
    77.55x = 106.92 × 52.95
  4. Step 4: Simplify right side
    77.55x = 5,661.41
  5. Step 5: Solve for x
    x = 5,661.41/77.55
  6. Step 6: Final answer
    x = 73.00

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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.