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Finding the Fourth Proportional to 50,721, 76,066.63 and 19,108.25

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Solution

The fourth proportional to 50,721, 76,066.63 and 19,108.25 is: 28,656.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,721 : 76,066.63 = 19,108.25 : x
  2. Step 2: Convert to fraction form
    50,721/76,066.63 = 19,108.25/x
  3. Step 3: Cross multiply
    50,721x = 76,066.63 × 19,108.25
  4. Step 4: Simplify right side
    50,721x = 1,453,500,182.70
  5. Step 5: Solve for x
    x = 1,453,500,182.70/50,721
  6. Step 6: Final answer
    x = 28,656.77

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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.