Home / 128,952,400.80-193,428,601.20-85,681,293.60

Finding the Fourth Proportional to 128,952,400.80, 193,428,601.20 and 85,681,293.60

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Solution

The fourth proportional to 128,952,400.80, 193,428,601.20 and 85,681,293.60 is: 128,521,940.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,952,400.80 : 193,428,601.20 = 85,681,293.60 : x
  2. Step 2: Convert to fraction form
    128,952,400.80/193,428,601.20 = 85,681,293.60/x
  3. Step 3: Cross multiply
    128,952,400.80x = 193,428,601.20 × 85,681,293.60
  4. Step 4: Simplify right side
    128,952,400.80x = 16,573,212,770,054,510
  5. Step 5: Solve for x
    x = 16,573,212,770,054,510/128,952,400.80
  6. Step 6: Final answer
    x = 128,521,940.40

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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.