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Finding the Fourth Proportional to 298,120.20, 447,026.42 and 87,730.84

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Solution

The fourth proportional to 298,120.20, 447,026.42 and 87,730.84 is: 131,550.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,120.20 : 447,026.42 = 87,730.84 : x
  2. Step 2: Convert to fraction form
    298,120.20/447,026.42 = 87,730.84/x
  3. Step 3: Cross multiply
    298,120.20x = 447,026.42 × 87,730.84
  4. Step 4: Simplify right side
    298,120.20x = 39,218,003,328.79
  5. Step 5: Solve for x
    x = 39,218,003,328.79/298,120.20
  6. Step 6: Final answer
    x = 131,550.98

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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.