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Finding the Fourth Proportional to 218,820.56, 328,249.20 and 61,050.92

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Solution

The fourth proportional to 218,820.56, 328,249.20 and 61,050.92 is: 91,581.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,820.56 : 328,249.20 = 61,050.92 : x
  2. Step 2: Convert to fraction form
    218,820.56/328,249.20 = 61,050.92/x
  3. Step 3: Cross multiply
    218,820.56x = 328,249.20 × 61,050.92
  4. Step 4: Simplify right side
    218,820.56x = 20,039,915,649.26
  5. Step 5: Solve for x
    x = 20,039,915,649.26/218,820.56
  6. Step 6: Final answer
    x = 91,581.50

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1.5x scale

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.