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Finding the Fourth Proportional to 128,410.70, 192,558.45 and 49,498.70

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Solution

The fourth proportional to 128,410.70, 192,558.45 and 49,498.70 is: 74,225.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,410.70 : 192,558.45 = 49,498.70 : x
  2. Step 2: Convert to fraction form
    128,410.70/192,558.45 = 49,498.70/x
  3. Step 3: Cross multiply
    128,410.70x = 192,558.45 × 49,498.70
  4. Step 4: Simplify right side
    128,410.70x = 9,531,392,949.02
  5. Step 5: Solve for x
    x = 9,531,392,949.02/128,410.70
  6. Step 6: Final answer
    x = 74,225.85

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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.