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Finding the Fourth Proportional to 280,013.33, 420,019.17 and 69,651.26

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Solution

The fourth proportional to 280,013.33, 420,019.17 and 69,651.26 is: 104,476.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,013.33 : 420,019.17 = 69,651.26 : x
  2. Step 2: Convert to fraction form
    280,013.33/420,019.17 = 69,651.26/x
  3. Step 3: Cross multiply
    280,013.33x = 420,019.17 × 69,651.26
  4. Step 4: Simplify right side
    280,013.33x = 29,254,862,314.56
  5. Step 5: Solve for x
    x = 29,254,862,314.56/280,013.33
  6. Step 6: Final answer
    x = 104,476.68

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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.