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Finding the Fourth Proportional to 80,364.96, 120,430.80 and 45,229.59

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Solution

The fourth proportional to 80,364.96, 120,430.80 and 45,229.59 is: 67,778.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,364.96 : 120,430.80 = 45,229.59 : x
  2. Step 2: Convert to fraction form
    80,364.96/120,430.80 = 45,229.59/x
  3. Step 3: Cross multiply
    80,364.96x = 120,430.80 × 45,229.59
  4. Step 4: Simplify right side
    80,364.96x = 5,447,035,707.37
  5. Step 5: Solve for x
    x = 5,447,035,707.37/80,364.96
  6. Step 6: Final answer
    x = 67,778.74

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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.