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Finding the Fourth Proportional to 128,797.02, 193,195.62 and 103,719.42

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Solution

The fourth proportional to 128,797.02, 193,195.62 and 103,719.42 is: 155,579.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,797.02 : 193,195.62 = 103,719.42 : x
  2. Step 2: Convert to fraction form
    128,797.02/193,195.62 = 103,719.42/x
  3. Step 3: Cross multiply
    128,797.02x = 193,195.62 × 103,719.42
  4. Step 4: Simplify right side
    128,797.02x = 20,038,137,652.94
  5. Step 5: Solve for x
    x = 20,038,137,652.94/128,797.02
  6. Step 6: Final answer
    x = 155,579.20

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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.