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Finding the Fourth Proportional to 85,608.50, 118,139.92 and 47,370.83

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Solution

The fourth proportional to 85,608.50, 118,139.92 and 47,370.83 is: 65,371.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,608.50 : 118,139.92 = 47,370.83 : x
  2. Step 2: Convert to fraction form
    85,608.50/118,139.92 = 47,370.83/x
  3. Step 3: Cross multiply
    85,608.50x = 118,139.92 × 47,370.83
  4. Step 4: Simplify right side
    85,608.50x = 5,596,385,357.41
  5. Step 5: Solve for x
    x = 5,596,385,357.41/85,608.50
  6. Step 6: Final answer
    x = 65,371.85

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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.