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Finding the Fourth Proportional to 213,575.80, 320,339.40 and 55,820.20

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Solution

The fourth proportional to 213,575.80, 320,339.40 and 55,820.20 is: 83,723.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,575.80 : 320,339.40 = 55,820.20 : x
  2. Step 2: Convert to fraction form
    213,575.80/320,339.40 = 55,820.20/x
  3. Step 3: Cross multiply
    213,575.80x = 320,339.40 × 55,820.20
  4. Step 4: Simplify right side
    213,575.80x = 17,881,409,375.88
  5. Step 5: Solve for x
    x = 17,881,409,375.88/213,575.80
  6. Step 6: Final answer
    x = 83,723.95

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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.