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Finding the Fourth Proportional to 85,879.89, 118,520.55 and 47,645.46

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Solution

The fourth proportional to 85,879.89, 118,520.55 and 47,645.46 is: 65,754.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,879.89 : 118,520.55 = 47,645.46 : x
  2. Step 2: Convert to fraction form
    85,879.89/118,520.55 = 47,645.46/x
  3. Step 3: Cross multiply
    85,879.89x = 118,520.55 × 47,645.46
  4. Step 4: Simplify right side
    85,879.89x = 5,646,966,124.20
  5. Step 5: Solve for x
    x = 5,646,966,124.20/85,879.89
  6. Step 6: Final answer
    x = 65,754.23

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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.