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Finding the Fourth Proportional to 72,672.60, 108,749.70 and 50,381.40

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Solution

The fourth proportional to 72,672.60, 108,749.70 and 50,381.40 is: 75,392.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,672.60 : 108,749.70 = 50,381.40 : x
  2. Step 2: Convert to fraction form
    72,672.60/108,749.70 = 50,381.40/x
  3. Step 3: Cross multiply
    72,672.60x = 108,749.70 × 50,381.40
  4. Step 4: Simplify right side
    72,672.60x = 5,478,962,135.58
  5. Step 5: Solve for x
    x = 5,478,962,135.58/72,672.60
  6. Step 6: Final answer
    x = 75,392.41

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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.