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Finding the Fourth Proportional to 131,443.80, 197,165.70 and 115,891.80

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Solution

The fourth proportional to 131,443.80, 197,165.70 and 115,891.80 is: 173,837.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,443.80 : 197,165.70 = 115,891.80 : x
  2. Step 2: Convert to fraction form
    131,443.80/197,165.70 = 115,891.80/x
  3. Step 3: Cross multiply
    131,443.80x = 197,165.70 × 115,891.80
  4. Step 4: Simplify right side
    131,443.80x = 22,849,887,871.26
  5. Step 5: Solve for x
    x = 22,849,887,871.26/131,443.80
  6. Step 6: Final answer
    x = 173,837.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.