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Finding the Fourth Proportional to 381,388.20, 572,082.30 and 97,078.20

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Solution

The fourth proportional to 381,388.20, 572,082.30 and 97,078.20 is: 145,617.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,388.20 : 572,082.30 = 97,078.20 : x
  2. Step 2: Convert to fraction form
    381,388.20/572,082.30 = 97,078.20/x
  3. Step 3: Cross multiply
    381,388.20x = 572,082.30 × 97,078.20
  4. Step 4: Simplify right side
    381,388.20x = 55,536,719,935.86
  5. Step 5: Solve for x
    x = 55,536,719,935.86/381,388.20
  6. Step 6: Final answer
    x = 145,617.30

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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.