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Finding the Fourth Proportional to 185,990.50, 278,985.89 and 61,331.50

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Solution

The fourth proportional to 185,990.50, 278,985.89 and 61,331.50 is: 91,997.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,990.50 : 278,985.89 = 61,331.50 : x
  2. Step 2: Convert to fraction form
    185,990.50/278,985.89 = 61,331.50/x
  3. Step 3: Cross multiply
    185,990.50x = 278,985.89 × 61,331.50
  4. Step 4: Simplify right side
    185,990.50x = 17,110,623,112.54
  5. Step 5: Solve for x
    x = 17,110,623,112.54/185,990.50
  6. Step 6: Final answer
    x = 91,997.30

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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.