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Finding the Fourth Proportional to 215,245.80, 322,715.10 and 96,820.20

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Solution

The fourth proportional to 215,245.80, 322,715.10 and 96,820.20 is: 145,161.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,245.80 : 322,715.10 = 96,820.20 : x
  2. Step 2: Convert to fraction form
    215,245.80/322,715.10 = 96,820.20/x
  3. Step 3: Cross multiply
    215,245.80x = 322,715.10 × 96,820.20
  4. Step 4: Simplify right side
    215,245.80x = 31,245,340,525.02
  5. Step 5: Solve for x
    x = 31,245,340,525.02/215,245.80
  6. Step 6: Final answer
    x = 145,161.21

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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.