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Finding the Fourth Proportional to 72,392.80, 108,589.20 and 69,973.60

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Solution

The fourth proportional to 72,392.80, 108,589.20 and 69,973.60 is: 104,960.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,392.80 : 108,589.20 = 69,973.60 : x
  2. Step 2: Convert to fraction form
    72,392.80/108,589.20 = 69,973.60/x
  3. Step 3: Cross multiply
    72,392.80x = 108,589.20 × 69,973.60
  4. Step 4: Simplify right side
    72,392.80x = 7,598,377,245.12
  5. Step 5: Solve for x
    x = 7,598,377,245.12/72,392.80
  6. Step 6: Final answer
    x = 104,960.40

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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.