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Finding the Fourth Proportional to 79,790.80, 119,686.20 and 27,259.60

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Solution

The fourth proportional to 79,790.80, 119,686.20 and 27,259.60 is: 40,889.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,790.80 : 119,686.20 = 27,259.60 : x
  2. Step 2: Convert to fraction form
    79,790.80/119,686.20 = 27,259.60/x
  3. Step 3: Cross multiply
    79,790.80x = 119,686.20 × 27,259.60
  4. Step 4: Simplify right side
    79,790.80x = 3,262,597,937.52
  5. Step 5: Solve for x
    x = 3,262,597,937.52/79,790.80
  6. Step 6: Final answer
    x = 40,889.40

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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.