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Finding the Fourth Proportional to 215,008.59, 322,388.25 and 72,806.40

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Solution

The fourth proportional to 215,008.59, 322,388.25 and 72,806.40 is: 109,167.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,008.59 : 322,388.25 = 72,806.40 : x
  2. Step 2: Convert to fraction form
    215,008.59/322,388.25 = 72,806.40/x
  3. Step 3: Cross multiply
    215,008.59x = 322,388.25 × 72,806.40
  4. Step 4: Simplify right side
    215,008.59x = 23,471,927,884.80
  5. Step 5: Solve for x
    x = 23,471,927,884.80/215,008.59
  6. Step 6: Final answer
    x = 109,167.40

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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.