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Finding the Fourth Proportional to 83,974.20, 117,719.40 and 83,974.20

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Solution

The fourth proportional to 83,974.20, 117,719.40 and 83,974.20 is: 117,719.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,974.20 : 117,719.40 = 83,974.20 : x
  2. Step 2: Convert to fraction form
    83,974.20/117,719.40 = 83,974.20/x
  3. Step 3: Cross multiply
    83,974.20x = 117,719.40 × 83,974.20
  4. Step 4: Simplify right side
    83,974.20x = 9,885,392,439.48
  5. Step 5: Solve for x
    x = 9,885,392,439.48/83,974.20
  6. Step 6: Final answer
    x = 117,719.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.