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Finding the Fourth Proportional to 122,728.56, 183,797.58 and 69,978.12

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Solution

The fourth proportional to 122,728.56, 183,797.58 and 69,978.12 is: 104,798.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,728.56 : 183,797.58 = 69,978.12 : x
  2. Step 2: Convert to fraction form
    122,728.56/183,797.58 = 69,978.12/x
  3. Step 3: Cross multiply
    122,728.56x = 183,797.58 × 69,978.12
  4. Step 4: Simplify right side
    122,728.56x = 12,861,809,108.95
  5. Step 5: Solve for x
    x = 12,861,809,108.95/122,728.56
  6. Step 6: Final answer
    x = 104,798.83

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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.