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Finding the Fourth Proportional to 426,102.38, 639,128.50 and 159,840.60

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Solution

The fourth proportional to 426,102.38, 639,128.50 and 159,840.60 is: 239,751.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,102.38 : 639,128.50 = 159,840.60 : x
  2. Step 2: Convert to fraction form
    426,102.38/639,128.50 = 159,840.60/x
  3. Step 3: Cross multiply
    426,102.38x = 639,128.50 × 159,840.60
  4. Step 4: Simplify right side
    426,102.38x = 102,158,682,917.10
  5. Step 5: Solve for x
    x = 102,158,682,917.10/426,102.38
  6. Step 6: Final answer
    x = 239,751.50

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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.