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Finding the Fourth Proportional to 425,380.68, 638,073.36 and 109,815.84

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Solution

The fourth proportional to 425,380.68, 638,073.36 and 109,815.84 is: 164,724.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,380.68 : 638,073.36 = 109,815.84 : x
  2. Step 2: Convert to fraction form
    425,380.68/638,073.36 = 109,815.84/x
  3. Step 3: Cross multiply
    425,380.68x = 638,073.36 × 109,815.84
  4. Step 4: Simplify right side
    425,380.68x = 70,070,562,010.02
  5. Step 5: Solve for x
    x = 70,070,562,010.02/425,380.68
  6. Step 6: Final answer
    x = 164,724.36

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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.