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Finding the Fourth Proportional to 89,791.50, 134,738.61 and 45,421.86

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Solution

The fourth proportional to 89,791.50, 134,738.61 and 45,421.86 is: 68,158.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,791.50 : 134,738.61 = 45,421.86 : x
  2. Step 2: Convert to fraction form
    89,791.50/134,738.61 = 45,421.86/x
  3. Step 3: Cross multiply
    89,791.50x = 134,738.61 × 45,421.86
  4. Step 4: Simplify right side
    89,791.50x = 6,120,078,280.01
  5. Step 5: Solve for x
    x = 6,120,078,280.01/89,791.50
  6. Step 6: Final answer
    x = 68,158.77

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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.