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Finding the Fourth Proportional to 252,415.78, 348,306.86 and 139,238.52

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Solution

The fourth proportional to 252,415.78, 348,306.86 and 139,238.52 is: 192,134.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,415.78 : 348,306.86 = 139,238.52 : x
  2. Step 2: Convert to fraction form
    252,415.78/348,306.86 = 139,238.52/x
  3. Step 3: Cross multiply
    252,415.78x = 348,306.86 × 139,238.52
  4. Step 4: Simplify right side
    252,415.78x = 48,497,731,692.25
  5. Step 5: Solve for x
    x = 48,497,731,692.25/252,415.78
  6. Step 6: Final answer
    x = 192,134.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.