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Finding the Fourth Proportional to 79,785.52, 119,677.92 and 20,616.16

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Solution

The fourth proportional to 79,785.52, 119,677.92 and 20,616.16 is: 30,924.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,785.52 : 119,677.92 = 20,616.16 : x
  2. Step 2: Convert to fraction form
    79,785.52/119,677.92 = 20,616.16/x
  3. Step 3: Cross multiply
    79,785.52x = 119,677.92 × 20,616.16
  4. Step 4: Simplify right side
    79,785.52x = 2,467,299,147.19
  5. Step 5: Solve for x
    x = 2,467,299,147.19/79,785.52
  6. Step 6: Final answer
    x = 30,924.15

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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.