Home / 131,963.21-181,991.64-102,898.78

Finding the Fourth Proportional to 131,963.21, 181,991.64 and 102,898.78

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Solution

The fourth proportional to 131,963.21, 181,991.64 and 102,898.78 is: 141,908.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,963.21 : 181,991.64 = 102,898.78 : x
  2. Step 2: Convert to fraction form
    131,963.21/181,991.64 = 102,898.78/x
  3. Step 3: Cross multiply
    131,963.21x = 181,991.64 × 102,898.78
  4. Step 4: Simplify right side
    131,963.21x = 18,726,717,726.20
  5. Step 5: Solve for x
    x = 18,726,717,726.20/131,963.21
  6. Step 6: Final answer
    x = 141,908.63

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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.