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Finding the Fourth Proportional to 72,403.20, 108,604.80 and 60,739.20

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Solution

The fourth proportional to 72,403.20, 108,604.80 and 60,739.20 is: 91,108.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,403.20 : 108,604.80 = 60,739.20 : x
  2. Step 2: Convert to fraction form
    72,403.20/108,604.80 = 60,739.20/x
  3. Step 3: Cross multiply
    72,403.20x = 108,604.80 × 60,739.20
  4. Step 4: Simplify right side
    72,403.20x = 6,596,568,668.16
  5. Step 5: Solve for x
    x = 6,596,568,668.16/72,403.20
  6. Step 6: Final answer
    x = 91,108.80

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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.