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Finding the Fourth Proportional to 81,307.47, 122,013.27 and 43,893.60

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Solution

The fourth proportional to 81,307.47, 122,013.27 and 43,893.60 is: 65,868.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,307.47 : 122,013.27 = 43,893.60 : x
  2. Step 2: Convert to fraction form
    81,307.47/122,013.27 = 43,893.60/x
  3. Step 3: Cross multiply
    81,307.47x = 122,013.27 × 43,893.60
  4. Step 4: Simplify right side
    81,307.47x = 5,355,600,838.54
  5. Step 5: Solve for x
    x = 5,355,600,838.54/81,307.47
  6. Step 6: Final answer
    x = 65,868.50

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1.5x scale

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.