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Finding the Fourth Proportional to 53,876.90, 80,731.53 and 20,578.79

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Solution

The fourth proportional to 53,876.90, 80,731.53 and 20,578.79 is: 30,836.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,876.90 : 80,731.53 = 20,578.79 : x
  2. Step 2: Convert to fraction form
    53,876.90/80,731.53 = 20,578.79/x
  3. Step 3: Cross multiply
    53,876.90x = 80,731.53 × 20,578.79
  4. Step 4: Simplify right side
    53,876.90x = 1,661,357,202.25
  5. Step 5: Solve for x
    x = 1,661,357,202.25/53,876.90
  6. Step 6: Final answer
    x = 30,836.17

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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.