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Finding the Fourth Proportional to 185,638.80, 278,489.79 and 73,260.21

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Solution

The fourth proportional to 185,638.80, 278,489.79 and 73,260.21 is: 109,902.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,638.80 : 278,489.79 = 73,260.21 : x
  2. Step 2: Convert to fraction form
    185,638.80/278,489.79 = 73,260.21/x
  3. Step 3: Cross multiply
    185,638.80x = 278,489.79 × 73,260.21
  4. Step 4: Simplify right side
    185,638.80x = 20,402,220,498.26
  5. Step 5: Solve for x
    x = 20,402,220,498.26/185,638.80
  6. Step 6: Final answer
    x = 109,902.78

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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.