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Finding the Fourth Proportional to 81,991.70, 122,951.55 and 37,603.70

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Solution

The fourth proportional to 81,991.70, 122,951.55 and 37,603.70 is: 56,389.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,991.70 : 122,951.55 = 37,603.70 : x
  2. Step 2: Convert to fraction form
    81,991.70/122,951.55 = 37,603.70/x
  3. Step 3: Cross multiply
    81,991.70x = 122,951.55 × 37,603.70
  4. Step 4: Simplify right side
    81,991.70x = 4,623,433,200.74
  5. Step 5: Solve for x
    x = 4,623,433,200.74/81,991.70
  6. Step 6: Final answer
    x = 56,389.04

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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.