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Finding the Fourth Proportional to 131,611.53, 181,619.10 and 75,011.97

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Solution

The fourth proportional to 131,611.53, 181,619.10 and 75,011.97 is: 103,513.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,611.53 : 181,619.10 = 75,011.97 : x
  2. Step 2: Convert to fraction form
    131,611.53/181,619.10 = 75,011.97/x
  3. Step 3: Cross multiply
    131,611.53x = 181,619.10 × 75,011.97
  4. Step 4: Simplify right side
    131,611.53x = 13,623,606,480.63
  5. Step 5: Solve for x
    x = 13,623,606,480.63/131,611.53
  6. Step 6: Final answer
    x = 103,513.78

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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.