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Finding the Fourth Proportional to 81,307.59, 122,013.42 and 43,893.71

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Solution

The fourth proportional to 81,307.59, 122,013.42 and 43,893.71 is: 65,868.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,307.59 : 122,013.42 = 43,893.71 : x
  2. Step 2: Convert to fraction form
    81,307.59/122,013.42 = 43,893.71/x
  3. Step 3: Cross multiply
    81,307.59x = 122,013.42 × 43,893.71
  4. Step 4: Simplify right side
    81,307.59x = 5,355,621,673.59
  5. Step 5: Solve for x
    x = 5,355,621,673.59/81,307.59
  6. Step 6: Final answer
    x = 65,868.66

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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.