Home / 187,789.78-259,154.40-102,911.50

Finding the Fourth Proportional to 187,789.78, 259,154.40 and 102,911.50

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Solution

The fourth proportional to 187,789.78, 259,154.40 and 102,911.50 is: 142,020.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,789.78 : 259,154.40 = 102,911.50 : x
  2. Step 2: Convert to fraction form
    187,789.78/259,154.40 = 102,911.50/x
  3. Step 3: Cross multiply
    187,789.78x = 259,154.40 × 102,911.50
  4. Step 4: Simplify right side
    187,789.78x = 26,669,968,035.60
  5. Step 5: Solve for x
    x = 26,669,968,035.60/187,789.78
  6. Step 6: Final answer
    x = 142,020.34

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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.