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Finding the Fourth Proportional to 107.52, 161.31 and 56.19

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Solution

The fourth proportional to 107.52, 161.31 and 56.19 is: 84.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.52 : 161.31 = 56.19 : x
  2. Step 2: Convert to fraction form
    107.52/161.31 = 56.19/x
  3. Step 3: Cross multiply
    107.52x = 161.31 × 56.19
  4. Step 4: Simplify right side
    107.52x = 9,064.51
  5. Step 5: Solve for x
    x = 9,064.51/107.52
  6. Step 6: Final answer
    x = 84.31

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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.