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Finding the Fourth Proportional to 131,865.72, 181,960.11 and 74,498.91

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Solution

The fourth proportional to 131,865.72, 181,960.11 and 74,498.91 is: 102,800.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,865.72 : 181,960.11 = 74,498.91 : x
  2. Step 2: Convert to fraction form
    131,865.72/181,960.11 = 74,498.91/x
  3. Step 3: Cross multiply
    131,865.72x = 181,960.11 × 74,498.91
  4. Step 4: Simplify right side
    131,865.72x = 13,555,829,858.48
  5. Step 5: Solve for x
    x = 13,555,829,858.48/131,865.72
  6. Step 6: Final answer
    x = 102,800.26

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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.