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Finding the Fourth Proportional to 116.61, 175.06 and 78.33

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Solution

The fourth proportional to 116.61, 175.06 and 78.33 is: 117.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.61 : 175.06 = 78.33 : x
  2. Step 2: Convert to fraction form
    116.61/175.06 = 78.33/x
  3. Step 3: Cross multiply
    116.61x = 175.06 × 78.33
  4. Step 4: Simplify right side
    116.61x = 13,712.45
  5. Step 5: Solve for x
    x = 13,712.45/116.61
  6. Step 6: Final answer
    x = 117.59

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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.