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Finding the Fourth Proportional to 117.36, 162.07 and 80.03

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Solution

The fourth proportional to 117.36, 162.07 and 80.03 is: 110.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    117.36 : 162.07 = 80.03 : x
  2. Step 2: Convert to fraction form
    117.36/162.07 = 80.03/x
  3. Step 3: Cross multiply
    117.36x = 162.07 × 80.03
  4. Step 4: Simplify right side
    117.36x = 12,970.67
  5. Step 5: Solve for x
    x = 12,970.67/117.36
  6. Step 6: Final answer
    x = 110.52

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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.