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Finding the Fourth Proportional to 77.10, 106.95 and 73.00

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Solution

The fourth proportional to 77.10, 106.95 and 73.00 is: 101.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    77.10 : 106.95 = 73.00 : x
  2. Step 2: Convert to fraction form
    77.10/106.95 = 73.00/x
  3. Step 3: Cross multiply
    77.10x = 106.95 × 73.00
  4. Step 4: Simplify right side
    77.10x = 7,806.45
  5. Step 5: Solve for x
    x = 7,806.45/77.10
  6. Step 6: Final answer
    x = 101.26

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.