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Finding the Fourth Proportional to 72,689.40, 109,082.70 and 33,226.20

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Solution

The fourth proportional to 72,689.40, 109,082.70 and 33,226.20 is: 49,861.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,689.40 : 109,082.70 = 33,226.20 : x
  2. Step 2: Convert to fraction form
    72,689.40/109,082.70 = 33,226.20/x
  3. Step 3: Cross multiply
    72,689.40x = 109,082.70 × 33,226.20
  4. Step 4: Simplify right side
    72,689.40x = 3,624,403,606.74
  5. Step 5: Solve for x
    x = 3,624,403,606.74/72,689.40
  6. Step 6: Final answer
    x = 49,861.51

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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.