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Finding the Fourth Proportional to 122,136.40, 183,204.60 and 90,643.60

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Solution

The fourth proportional to 122,136.40, 183,204.60 and 90,643.60 is: 135,965.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,136.40 : 183,204.60 = 90,643.60 : x
  2. Step 2: Convert to fraction form
    122,136.40/183,204.60 = 90,643.60/x
  3. Step 3: Cross multiply
    122,136.40x = 183,204.60 × 90,643.60
  4. Step 4: Simplify right side
    122,136.40x = 16,606,324,480.56
  5. Step 5: Solve for x
    x = 16,606,324,480.56/122,136.40
  6. Step 6: Final answer
    x = 135,965.40

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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.