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Finding the Fourth Proportional to 128,416.70, 192,396.49 and 109,504.87

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Solution

The fourth proportional to 128,416.70, 192,396.49 and 109,504.87 is: 164,062.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,416.70 : 192,396.49 = 109,504.87 : x
  2. Step 2: Convert to fraction form
    128,416.70/192,396.49 = 109,504.87/x
  3. Step 3: Cross multiply
    128,416.70x = 192,396.49 × 109,504.87
  4. Step 4: Simplify right side
    128,416.70x = 21,068,351,871.15
  5. Step 5: Solve for x
    x = 21,068,351,871.15/128,416.70
  6. Step 6: Final answer
    x = 164,062.40

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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.