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Finding the Fourth Proportional to 86,661.72, 119,477.52 and 68,815.80

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Solution

The fourth proportional to 86,661.72, 119,477.52 and 68,815.80 is: 94,873.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,661.72 : 119,477.52 = 68,815.80 : x
  2. Step 2: Convert to fraction form
    86,661.72/119,477.52 = 68,815.80/x
  3. Step 3: Cross multiply
    86,661.72x = 119,477.52 × 68,815.80
  4. Step 4: Simplify right side
    86,661.72x = 8,221,941,120.82
  5. Step 5: Solve for x
    x = 8,221,941,120.82/86,661.72
  6. Step 6: Final answer
    x = 94,873.97

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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.