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Finding the Fourth Proportional to 326,722.68, 490,111.92 and 90,065.52

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Solution

The fourth proportional to 326,722.68, 490,111.92 and 90,065.52 is: 135,105.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,722.68 : 490,111.92 = 90,065.52 : x
  2. Step 2: Convert to fraction form
    326,722.68/490,111.92 = 90,065.52/x
  3. Step 3: Cross multiply
    326,722.68x = 490,111.92 × 90,065.52
  4. Step 4: Simplify right side
    326,722.68x = 44,142,184,933.00
  5. Step 5: Solve for x
    x = 44,142,184,933.00/326,722.68
  6. Step 6: Final answer
    x = 135,105.97

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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.