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Finding the Fourth Proportional to 108,718.34, 162,891.60 and 85,016.73

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Solution

The fourth proportional to 108,718.34, 162,891.60 and 85,016.73 is: 127,379.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,718.34 : 162,891.60 = 85,016.73 : x
  2. Step 2: Convert to fraction form
    108,718.34/162,891.60 = 85,016.73/x
  3. Step 3: Cross multiply
    108,718.34x = 162,891.60 × 85,016.73
  4. Step 4: Simplify right side
    108,718.34x = 13,848,511,176.47
  5. Step 5: Solve for x
    x = 13,848,511,176.47/108,718.34
  6. Step 6: Final answer
    x = 127,379.72

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1.5x scale

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.