Home / 128,915,410.20-193,373,115.30-99,690,091.80

Finding the Fourth Proportional to 128,915,410.20, 193,373,115.30 and 99,690,091.80

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Solution

The fourth proportional to 128,915,410.20, 193,373,115.30 and 99,690,091.80 is: 149,535,137.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,915,410.20 : 193,373,115.30 = 99,690,091.80 : x
  2. Step 2: Convert to fraction form
    128,915,410.20/193,373,115.30 = 99,690,091.80/x
  3. Step 3: Cross multiply
    128,915,410.20x = 193,373,115.30 × 99,690,091.80
  4. Step 4: Simplify right side
    128,915,410.20x = 19,277,383,615,908,984
  5. Step 5: Solve for x
    x = 19,277,383,615,908,984/128,915,410.20
  6. Step 6: Final answer
    x = 149,535,137.70

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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.