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Finding the Fourth Proportional to 425,316.90, 638,100.08 and 125,805.36

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Solution

The fourth proportional to 425,316.90, 638,100.08 and 125,805.36 is: 188,744.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,316.90 : 638,100.08 = 125,805.36 : x
  2. Step 2: Convert to fraction form
    425,316.90/638,100.08 = 125,805.36/x
  3. Step 3: Cross multiply
    425,316.90x = 638,100.08 × 125,805.36
  4. Step 4: Simplify right side
    425,316.90x = 80,276,410,280.43
  5. Step 5: Solve for x
    x = 80,276,410,280.43/425,316.90
  6. Step 6: Final answer
    x = 188,744.93

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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.