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Finding the Fourth Proportional to 79,530.45, 119,292.90 and 20,366.61

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Solution

The fourth proportional to 79,530.45, 119,292.90 and 20,366.61 is: 30,549.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,530.45 : 119,292.90 = 20,366.61 : x
  2. Step 2: Convert to fraction form
    79,530.45/119,292.90 = 20,366.61/x
  3. Step 3: Cross multiply
    79,530.45x = 119,292.90 × 20,366.61
  4. Step 4: Simplify right side
    79,530.45x = 2,429,591,970.07
  5. Step 5: Solve for x
    x = 2,429,591,970.07/79,530.45
  6. Step 6: Final answer
    x = 30,549.20

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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.