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Finding the Fourth Proportional to 280,007.96, 420,011.14 and 69,645.90

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Solution

The fourth proportional to 280,007.96, 420,011.14 and 69,645.90 is: 104,468.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,007.96 : 420,011.14 = 69,645.90 : x
  2. Step 2: Convert to fraction form
    280,007.96/420,011.14 = 69,645.90/x
  3. Step 3: Cross multiply
    280,007.96x = 420,011.14 × 69,645.90
  4. Step 4: Simplify right side
    280,007.96x = 29,252,051,755.27
  5. Step 5: Solve for x
    x = 29,252,051,755.27/280,007.96
  6. Step 6: Final answer
    x = 104,468.65

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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.