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Finding the Fourth Proportional to 79.00, 108.95 and 51.35

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Solution

The fourth proportional to 79.00, 108.95 and 51.35 is: 70.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.00 : 108.95 = 51.35 : x
  2. Step 2: Convert to fraction form
    79.00/108.95 = 51.35/x
  3. Step 3: Cross multiply
    79.00x = 108.95 × 51.35
  4. Step 4: Simplify right side
    79.00x = 5,594.17
  5. Step 5: Solve for x
    x = 5,594.17/79.00
  6. Step 6: Final answer
    x = 70.81

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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.