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Finding the Fourth Proportional to 122,732.80, 183,969.60 and 70,028.80

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Solution

The fourth proportional to 122,732.80, 183,969.60 and 70,028.80 is: 104,969.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,732.80 : 183,969.60 = 70,028.80 : x
  2. Step 2: Convert to fraction form
    122,732.80/183,969.60 = 70,028.80/x
  3. Step 3: Cross multiply
    122,732.80x = 183,969.60 × 70,028.80
  4. Step 4: Simplify right side
    122,732.80x = 12,883,170,324.48
  5. Step 5: Solve for x
    x = 12,883,170,324.48/122,732.80
  6. Step 6: Final answer
    x = 104,969.25

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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.