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Finding the Fourth Proportional to 53,781.71, 80,682.82 and 20,498.99

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Solution

The fourth proportional to 53,781.71, 80,682.82 and 20,498.99 is: 30,752.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,781.71 : 80,682.82 = 20,498.99 : x
  2. Step 2: Convert to fraction form
    53,781.71/80,682.82 = 20,498.99/x
  3. Step 3: Cross multiply
    53,781.71x = 80,682.82 × 20,498.99
  4. Step 4: Simplify right side
    53,781.71x = 1,653,915,865.69
  5. Step 5: Solve for x
    x = 1,653,915,865.69/53,781.71
  6. Step 6: Final answer
    x = 30,752.39

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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.