Home / 128,958,629.80-193,437,944.70-121,568,319.40

Finding the Fourth Proportional to 128,958,629.80, 193,437,944.70 and 121,568,319.40

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Solution

The fourth proportional to 128,958,629.80, 193,437,944.70 and 121,568,319.40 is: 182,352,479.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,958,629.80 : 193,437,944.70 = 121,568,319.40 : x
  2. Step 2: Convert to fraction form
    128,958,629.80/193,437,944.70 = 121,568,319.40/x
  3. Step 3: Cross multiply
    128,958,629.80x = 193,437,944.70 × 121,568,319.40
  4. Step 4: Simplify right side
    128,958,629.80x = 23,515,925,845,369,136
  5. Step 5: Solve for x
    x = 23,515,925,845,369,136/128,958,629.80
  6. Step 6: Final answer
    x = 182,352,479.10

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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.