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Finding the Fourth Proportional to 79,569.88, 119,345.92 and 20,406.94

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Solution

The fourth proportional to 79,569.88, 119,345.92 and 20,406.94 is: 30,608.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,569.88 : 119,345.92 = 20,406.94 : x
  2. Step 2: Convert to fraction form
    79,569.88/119,345.92 = 20,406.94/x
  3. Step 3: Cross multiply
    79,569.88x = 119,345.92 × 20,406.94
  4. Step 4: Simplify right side
    79,569.88x = 2,435,485,028.68
  5. Step 5: Solve for x
    x = 2,435,485,028.68/79,569.88
  6. Step 6: Final answer
    x = 30,608.13

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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.