Home / 128,757,965.20-193,136,947.80-87,943,296.40

Finding the Fourth Proportional to 128,757,965.20, 193,136,947.80 and 87,943,296.40

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Solution

The fourth proportional to 128,757,965.20, 193,136,947.80 and 87,943,296.40 is: 131,914,944.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,757,965.20 : 193,136,947.80 = 87,943,296.40 : x
  2. Step 2: Convert to fraction form
    128,757,965.20/193,136,947.80 = 87,943,296.40/x
  3. Step 3: Cross multiply
    128,757,965.20x = 193,136,947.80 × 87,943,296.40
  4. Step 4: Simplify right side
    128,757,965.20x = 16,985,099,846,166,730
  5. Step 5: Solve for x
    x = 16,985,099,846,166,730/128,757,965.20
  6. Step 6: Final answer
    x = 131,914,944.60

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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.