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Finding the Fourth Proportional to 79, 118.28 and 56.04

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Solution

The fourth proportional to 79, 118.28 and 56.04 is: 83.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    79 : 118.28 = 56.04 : x
  2. Step 2: Convert to fraction form
    79/118.28 = 56.04/x
  3. Step 3: Cross multiply
    79x = 118.28 × 56.04
  4. Step 4: Simplify right side
    79x = 6,628.41
  5. Step 5: Solve for x
    x = 6,628.41/79
  6. Step 6: Final answer
    x = 83.90

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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.