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Finding the Fourth Proportional to 71,989.63, 107,984.45 and 36,906.91

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Solution

The fourth proportional to 71,989.63, 107,984.45 and 36,906.91 is: 55,360.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,989.63 : 107,984.45 = 36,906.91 : x
  2. Step 2: Convert to fraction form
    71,989.63/107,984.45 = 36,906.91/x
  3. Step 3: Cross multiply
    71,989.63x = 107,984.45 × 36,906.91
  4. Step 4: Simplify right side
    71,989.63x = 3,985,372,199.86
  5. Step 5: Solve for x
    x = 3,985,372,199.86/71,989.63
  6. Step 6: Final answer
    x = 55,360.37

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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.