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Finding the Fourth Proportional to 213,177.20, 319,765.80 and 124,530.80

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Solution

The fourth proportional to 213,177.20, 319,765.80 and 124,530.80 is: 186,796.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,177.20 : 319,765.80 = 124,530.80 : x
  2. Step 2: Convert to fraction form
    213,177.20/319,765.80 = 124,530.80/x
  3. Step 3: Cross multiply
    213,177.20x = 319,765.80 × 124,530.80
  4. Step 4: Simplify right side
    213,177.20x = 39,820,690,886.64
  5. Step 5: Solve for x
    x = 39,820,690,886.64/213,177.20
  6. Step 6: Final answer
    x = 186,796.20

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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.