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Finding the Fourth Proportional to 86,007.87, 118,686.86 and 47,769.86

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Solution

The fourth proportional to 86,007.87, 118,686.86 and 47,769.86 is: 65,920.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,007.87 : 118,686.86 = 47,769.86 : x
  2. Step 2: Convert to fraction form
    86,007.87/118,686.86 = 47,769.86/x
  3. Step 3: Cross multiply
    86,007.87x = 118,686.86 × 47,769.86
  4. Step 4: Simplify right side
    86,007.87x = 5,669,654,686.04
  5. Step 5: Solve for x
    x = 5,669,654,686.04/86,007.87
  6. Step 6: Final answer
    x = 65,920.18

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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.