Home / 128,809,901.80-193,214,852.70-85,811,732.20

Finding the Fourth Proportional to 128,809,901.80, 193,214,852.70 and 85,811,732.20

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Solution

The fourth proportional to 128,809,901.80, 193,214,852.70 and 85,811,732.20 is: 128,717,598.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,809,901.80 : 193,214,852.70 = 85,811,732.20 : x
  2. Step 2: Convert to fraction form
    128,809,901.80/193,214,852.70 = 85,811,732.20/x
  3. Step 3: Cross multiply
    128,809,901.80x = 193,214,852.70 × 85,811,732.20
  4. Step 4: Simplify right side
    128,809,901.80x = 16,580,101,196,954,846
  5. Step 5: Solve for x
    x = 16,580,101,196,954,846/128,809,901.80
  6. Step 6: Final answer
    x = 128,717,598.30

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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.