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Finding the Fourth Proportional to 60,786.39, 91,143.55 and 20,791.22

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Solution

The fourth proportional to 60,786.39, 91,143.55 and 20,791.22 is: 31,174.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,786.39 : 91,143.55 = 20,791.22 : x
  2. Step 2: Convert to fraction form
    60,786.39/91,143.55 = 20,791.22/x
  3. Step 3: Cross multiply
    60,786.39x = 91,143.55 × 20,791.22
  4. Step 4: Simplify right side
    60,786.39x = 1,894,985,599.63
  5. Step 5: Solve for x
    x = 1,894,985,599.63/60,786.39
  6. Step 6: Final answer
    x = 31,174.50

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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.