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Finding the Fourth Proportional to 79,780.80, 119,649.60 and 23,620.80

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Solution

The fourth proportional to 79,780.80, 119,649.60 and 23,620.80 is: 35,424.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,780.80 : 119,649.60 = 23,620.80 : x
  2. Step 2: Convert to fraction form
    79,780.80/119,649.60 = 23,620.80/x
  3. Step 3: Cross multiply
    79,780.80x = 119,649.60 × 23,620.80
  4. Step 4: Simplify right side
    79,780.80x = 2,826,219,271.68
  5. Step 5: Solve for x
    x = 2,826,219,271.68/79,780.80
  6. Step 6: Final answer
    x = 35,424.80

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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.