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Finding the Fourth Proportional to 67,809.60, 101,644.20 and 30,387.60

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Solution

The fourth proportional to 67,809.60, 101,644.20 and 30,387.60 is: 45,549.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,809.60 : 101,644.20 = 30,387.60 : x
  2. Step 2: Convert to fraction form
    67,809.60/101,644.20 = 30,387.60/x
  3. Step 3: Cross multiply
    67,809.60x = 101,644.20 × 30,387.60
  4. Step 4: Simplify right side
    67,809.60x = 3,088,723,291.92
  5. Step 5: Solve for x
    x = 3,088,723,291.92/67,809.60
  6. Step 6: Final answer
    x = 45,549.94

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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.