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Finding the Fourth Proportional to 131,787.81, 181,859.81 and 78,077.97

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Solution

The fourth proportional to 131,787.81, 181,859.81 and 78,077.97 is: 107,743.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,787.81 : 181,859.81 = 78,077.97 : x
  2. Step 2: Convert to fraction form
    131,787.81/181,859.81 = 78,077.97/x
  3. Step 3: Cross multiply
    131,787.81x = 181,859.81 × 78,077.97
  4. Step 4: Simplify right side
    131,787.81x = 14,199,244,399.00
  5. Step 5: Solve for x
    x = 14,199,244,399.00/131,787.81
  6. Step 6: Final answer
    x = 107,743.23

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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.