Home / 128,052.28-192,136.02-81,292.60

Finding the Fourth Proportional to 128,052.28, 192,136.02 and 81,292.60

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Solution

The fourth proportional to 128,052.28, 192,136.02 and 81,292.60 is: 121,975.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,052.28 : 192,136.02 = 81,292.60 : x
  2. Step 2: Convert to fraction form
    128,052.28/192,136.02 = 81,292.60/x
  3. Step 3: Cross multiply
    128,052.28x = 192,136.02 × 81,292.60
  4. Step 4: Simplify right side
    128,052.28x = 15,619,236,619.45
  5. Step 5: Solve for x
    x = 15,619,236,619.45/128,052.28
  6. Step 6: Final answer
    x = 121,975.47

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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.