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Finding the Fourth Proportional to 79.32, 117.36 and 79.08

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Solution

The fourth proportional to 79.32, 117.36 and 79.08 is: 117.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.32 : 117.36 = 79.08 : x
  2. Step 2: Convert to fraction form
    79.32/117.36 = 79.08/x
  3. Step 3: Cross multiply
    79.32x = 117.36 × 79.08
  4. Step 4: Simplify right side
    79.32x = 9,280.83
  5. Step 5: Solve for x
    x = 9,280.83/79.32
  6. Step 6: Final answer
    x = 117.00

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.