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Finding the Fourth Proportional to 117.48, 162.13 and 65.03

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Solution

The fourth proportional to 117.48, 162.13 and 65.03 is: 89.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    117.48 : 162.13 = 65.03 : x
  2. Step 2: Convert to fraction form
    117.48/162.13 = 65.03/x
  3. Step 3: Cross multiply
    117.48x = 162.13 × 65.03
  4. Step 4: Simplify right side
    117.48x = 10,543.31
  5. Step 5: Solve for x
    x = 10,543.31/117.48
  6. Step 6: Final answer
    x = 89.75

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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.