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Finding the Fourth Proportional to 112,917, 169,375.50 and 39,045

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Solution

The fourth proportional to 112,917, 169,375.50 and 39,045 is: 58,567.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,917 : 169,375.50 = 39,045 : x
  2. Step 2: Convert to fraction form
    112,917/169,375.50 = 39,045/x
  3. Step 3: Cross multiply
    112,917x = 169,375.50 × 39,045
  4. Step 4: Simplify right side
    112,917x = 6,613,266,397.50
  5. Step 5: Solve for x
    x = 6,613,266,397.50/112,917
  6. Step 6: Final answer
    x = 58,567.50

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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.