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Finding the Fourth Proportional to 81,651.77, 112,686.87 and 47,676.72

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Solution

The fourth proportional to 81,651.77, 112,686.87 and 47,676.72 is: 65,798.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,651.77 : 112,686.87 = 47,676.72 : x
  2. Step 2: Convert to fraction form
    81,651.77/112,686.87 = 47,676.72/x
  3. Step 3: Cross multiply
    81,651.77x = 112,686.87 × 47,676.72
  4. Step 4: Simplify right side
    81,651.77x = 5,372,540,348.67
  5. Step 5: Solve for x
    x = 5,372,540,348.67/81,651.77
  6. Step 6: Final answer
    x = 65,798.21

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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.