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Finding the Fourth Proportional to 67,408.58, 101,109.21 and 20,661.58

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Solution

The fourth proportional to 67,408.58, 101,109.21 and 20,661.58 is: 30,991.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,408.58 : 101,109.21 = 20,661.58 : x
  2. Step 2: Convert to fraction form
    67,408.58/101,109.21 = 20,661.58/x
  3. Step 3: Cross multiply
    67,408.58x = 101,109.21 × 20,661.58
  4. Step 4: Simplify right side
    67,408.58x = 2,089,076,031.15
  5. Step 5: Solve for x
    x = 2,089,076,031.15/67,408.58
  6. Step 6: Final answer
    x = 30,991.25

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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.