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Finding the Fourth Proportional to 187,891.76, 259,287.84 and 103,008.80

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Solution

The fourth proportional to 187,891.76, 259,287.84 and 103,008.80 is: 142,150.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,891.76 : 259,287.84 = 103,008.80 : x
  2. Step 2: Convert to fraction form
    187,891.76/259,287.84 = 103,008.80/x
  3. Step 3: Cross multiply
    187,891.76x = 259,287.84 × 103,008.80
  4. Step 4: Simplify right side
    187,891.76x = 26,708,929,252.99
  5. Step 5: Solve for x
    x = 26,708,929,252.99/187,891.76
  6. Step 6: Final answer
    x = 142,150.62

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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.