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Finding the Fourth Proportional to 425,508.78, 638,265.23 and 125,995.01

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Solution

The fourth proportional to 425,508.78, 638,265.23 and 125,995.01 is: 188,993.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,508.78 : 638,265.23 = 125,995.01 : x
  2. Step 2: Convert to fraction form
    425,508.78/638,265.23 = 125,995.01/x
  3. Step 3: Cross multiply
    425,508.78x = 638,265.23 × 125,995.01
  4. Step 4: Simplify right side
    425,508.78x = 80,418,234,036.50
  5. Step 5: Solve for x
    x = 80,418,234,036.50/425,508.78
  6. Step 6: Final answer
    x = 188,993.12

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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.