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Finding the Fourth Proportional to 122,571.80, 183,857.70 and 69,986.60

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Solution

The fourth proportional to 122,571.80, 183,857.70 and 69,986.60 is: 104,979.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,571.80 : 183,857.70 = 69,986.60 : x
  2. Step 2: Convert to fraction form
    122,571.80/183,857.70 = 69,986.60/x
  3. Step 3: Cross multiply
    122,571.80x = 183,857.70 × 69,986.60
  4. Step 4: Simplify right side
    122,571.80x = 12,867,575,306.82
  5. Step 5: Solve for x
    x = 12,867,575,306.82/122,571.80
  6. Step 6: Final answer
    x = 104,979.90

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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.