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Finding the Fourth Proportional to 420,107.10, 630,157.41 and 104,561.88

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Solution

The fourth proportional to 420,107.10, 630,157.41 and 104,561.88 is: 156,842.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,107.10 : 630,157.41 = 104,561.88 : x
  2. Step 2: Convert to fraction form
    420,107.10/630,157.41 = 104,561.88/x
  3. Step 3: Cross multiply
    420,107.10x = 630,157.41 × 104,561.88
  4. Step 4: Simplify right side
    420,107.10x = 65,890,443,485.53
  5. Step 5: Solve for x
    x = 65,890,443,485.53/420,107.10
  6. Step 6: Final answer
    x = 156,842.01

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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.