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Finding the Fourth Proportional to 131,838.74, 181,936.36 and 71,407.97

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Solution

The fourth proportional to 131,838.74, 181,936.36 and 71,407.97 is: 98,542.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,838.74 : 181,936.36 = 71,407.97 : x
  2. Step 2: Convert to fraction form
    131,838.74/181,936.36 = 71,407.97/x
  3. Step 3: Cross multiply
    131,838.74x = 181,936.36 × 71,407.97
  4. Step 4: Simplify right side
    131,838.74x = 12,991,706,136.79
  5. Step 5: Solve for x
    x = 12,991,706,136.79/131,838.74
  6. Step 6: Final answer
    x = 98,542.40

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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.