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Finding the Fourth Proportional to 86,159.89, 118,898.34 and 47,917.46

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Solution

The fourth proportional to 86,159.89, 118,898.34 and 47,917.46 is: 66,124.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,159.89 : 118,898.34 = 47,917.46 : x
  2. Step 2: Convert to fraction form
    86,159.89/118,898.34 = 47,917.46/x
  3. Step 3: Cross multiply
    86,159.89x = 118,898.34 × 47,917.46
  4. Step 4: Simplify right side
    86,159.89x = 5,697,306,451.02
  5. Step 5: Solve for x
    x = 5,697,306,451.02/86,159.89
  6. Step 6: Final answer
    x = 66,124.81

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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.