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Finding the Fourth Proportional to 213,591.40, 320,435.70 and 124,799.20

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Solution

The fourth proportional to 213,591.40, 320,435.70 and 124,799.20 is: 187,227.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,591.40 : 320,435.70 = 124,799.20 : x
  2. Step 2: Convert to fraction form
    213,591.40/320,435.70 = 124,799.20/x
  3. Step 3: Cross multiply
    213,591.40x = 320,435.70 × 124,799.20
  4. Step 4: Simplify right side
    213,591.40x = 39,990,119,011.44
  5. Step 5: Solve for x
    x = 39,990,119,011.44/213,591.40
  6. Step 6: Final answer
    x = 187,227.20

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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.