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Finding the Fourth Proportional to 86,709.39, 119,623.55 and 68,732.25

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Solution

The fourth proportional to 86,709.39, 119,623.55 and 68,732.25 is: 94,822.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,709.39 : 119,623.55 = 68,732.25 : x
  2. Step 2: Convert to fraction form
    86,709.39/119,623.55 = 68,732.25/x
  3. Step 3: Cross multiply
    86,709.39x = 119,623.55 × 68,732.25
  4. Step 4: Simplify right side
    86,709.39x = 8,221,995,400.83
  5. Step 5: Solve for x
    x = 8,221,995,400.83/86,709.39
  6. Step 6: Final answer
    x = 94,822.43

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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.