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Finding the Fourth Proportional to 86,163.98, 118,897.20 and 47,917.32

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Solution

The fourth proportional to 86,163.98, 118,897.20 and 47,917.32 is: 66,120.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,163.98 : 118,897.20 = 47,917.32 : x
  2. Step 2: Convert to fraction form
    86,163.98/118,897.20 = 47,917.32/x
  3. Step 3: Cross multiply
    86,163.98x = 118,897.20 × 47,917.32
  4. Step 4: Simplify right side
    86,163.98x = 5,697,235,179.50
  5. Step 5: Solve for x
    x = 5,697,235,179.50/86,163.98
  6. Step 6: Final answer
    x = 66,120.85

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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.