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Finding the Fourth Proportional to 131,616.69, 181,630.31 and 71,186.87

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Solution

The fourth proportional to 131,616.69, 181,630.31 and 71,186.87 is: 98,237.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,616.69 : 181,630.31 = 71,186.87 : x
  2. Step 2: Convert to fraction form
    131,616.69/181,630.31 = 71,186.87/x
  3. Step 3: Cross multiply
    131,616.69x = 181,630.31 × 71,186.87
  4. Step 4: Simplify right side
    131,616.69x = 12,929,692,001.94
  5. Step 5: Solve for x
    x = 12,929,692,001.94/131,616.69
  6. Step 6: Final answer
    x = 98,237.48

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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.