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Finding the Fourth Proportional to 79.13, 118.80 and 56.25

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Solution

The fourth proportional to 79.13, 118.80 and 56.25 is: 84.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.13 : 118.80 = 56.25 : x
  2. Step 2: Convert to fraction form
    79.13/118.80 = 56.25/x
  3. Step 3: Cross multiply
    79.13x = 118.80 × 56.25
  4. Step 4: Simplify right side
    79.13x = 6,682.50
  5. Step 5: Solve for x
    x = 6,682.50/79.13
  6. Step 6: Final answer
    x = 84.45

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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.