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Finding the Fourth Proportional to 128,136.88, 192,274.24 and 53,308.64

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Solution

The fourth proportional to 128,136.88, 192,274.24 and 53,308.64 is: 79,991.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,136.88 : 192,274.24 = 53,308.64 : x
  2. Step 2: Convert to fraction form
    128,136.88/192,274.24 = 53,308.64/x
  3. Step 3: Cross multiply
    128,136.88x = 192,274.24 × 53,308.64
  4. Step 4: Simplify right side
    128,136.88x = 10,249,878,241.43
  5. Step 5: Solve for x
    x = 10,249,878,241.43/128,136.88
  6. Step 6: Final answer
    x = 79,991.63

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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.