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Finding the Fourth Proportional to 113,768.78, 156,999.87 and 62,781.98

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Solution

The fourth proportional to 113,768.78, 156,999.87 and 62,781.98 is: 86,638.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,768.78 : 156,999.87 = 62,781.98 : x
  2. Step 2: Convert to fraction form
    113,768.78/156,999.87 = 62,781.98/x
  3. Step 3: Cross multiply
    113,768.78x = 156,999.87 × 62,781.98
  4. Step 4: Simplify right side
    113,768.78x = 9,856,761,913.34
  5. Step 5: Solve for x
    x = 9,856,761,913.34/113,768.78
  6. Step 6: Final answer
    x = 86,638.55

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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.