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Finding the Fourth Proportional to 187,959.78, 259,388.19 and 103,081.50

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Solution

The fourth proportional to 187,959.78, 259,388.19 and 103,081.50 is: 142,254.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,959.78 : 259,388.19 = 103,081.50 : x
  2. Step 2: Convert to fraction form
    187,959.78/259,388.19 = 103,081.50/x
  3. Step 3: Cross multiply
    187,959.78x = 259,388.19 × 103,081.50
  4. Step 4: Simplify right side
    187,959.78x = 26,738,123,707.49
  5. Step 5: Solve for x
    x = 26,738,123,707.49/187,959.78
  6. Step 6: Final answer
    x = 142,254.50

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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.