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Finding the Fourth Proportional to 426,069.36, 639,018.18 and 156,105.54

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Solution

The fourth proportional to 426,069.36, 639,018.18 and 156,105.54 is: 234,126.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,069.36 : 639,018.18 = 156,105.54 : x
  2. Step 2: Convert to fraction form
    426,069.36/639,018.18 = 156,105.54/x
  3. Step 3: Cross multiply
    426,069.36x = 639,018.18 × 156,105.54
  4. Step 4: Simplify right side
    426,069.36x = 99,754,278,058.72
  5. Step 5: Solve for x
    x = 99,754,278,058.72/426,069.36
  6. Step 6: Final answer
    x = 234,126.85

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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.