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Finding the Fourth Proportional to 72,002.70, 108,004.05 and 54,261.90

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Solution

The fourth proportional to 72,002.70, 108,004.05 and 54,261.90 is: 81,392.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,002.70 : 108,004.05 = 54,261.90 : x
  2. Step 2: Convert to fraction form
    72,002.70/108,004.05 = 54,261.90/x
  3. Step 3: Cross multiply
    72,002.70x = 108,004.05 × 54,261.90
  4. Step 4: Simplify right side
    72,002.70x = 5,860,504,960.70
  5. Step 5: Solve for x
    x = 5,860,504,960.70/72,002.70
  6. Step 6: Final answer
    x = 81,392.85

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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.