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Finding the Fourth Proportional to 81,737.61, 122,603.09 and 28,441.79

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Solution

The fourth proportional to 81,737.61, 122,603.09 and 28,441.79 is: 42,661.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,737.61 : 122,603.09 = 28,441.79 : x
  2. Step 2: Convert to fraction form
    81,737.61/122,603.09 = 28,441.79/x
  3. Step 3: Cross multiply
    81,737.61x = 122,603.09 × 28,441.79
  4. Step 4: Simplify right side
    81,737.61x = 3,487,050,583.91
  5. Step 5: Solve for x
    x = 3,487,050,583.91/81,737.61
  6. Step 6: Final answer
    x = 42,661.52

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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.