Home / 122,928.20-183,954.90-85,311.80

Finding the Fourth Proportional to 122,928.20, 183,954.90 and 85,311.80

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Solution

The fourth proportional to 122,928.20, 183,954.90 and 85,311.80 is: 127,664.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,928.20 : 183,954.90 = 85,311.80 : x
  2. Step 2: Convert to fraction form
    122,928.20/183,954.90 = 85,311.80/x
  3. Step 3: Cross multiply
    122,928.20x = 183,954.90 × 85,311.80
  4. Step 4: Simplify right side
    122,928.20x = 15,693,523,637.82
  5. Step 5: Solve for x
    x = 15,693,523,637.82/122,928.20
  6. Step 6: Final answer
    x = 127,664.15

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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.