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Finding the Fourth Proportional to 72,122.79, 108,184.19 and 30,002.08

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Solution

The fourth proportional to 72,122.79, 108,184.19 and 30,002.08 is: 45,003.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,122.79 : 108,184.19 = 30,002.08 : x
  2. Step 2: Convert to fraction form
    72,122.79/108,184.19 = 30,002.08/x
  3. Step 3: Cross multiply
    72,122.79x = 108,184.19 × 30,002.08
  4. Step 4: Simplify right side
    72,122.79x = 3,245,750,723.12
  5. Step 5: Solve for x
    x = 3,245,750,723.12/72,122.79
  6. Step 6: Final answer
    x = 45,003.12

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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.