Home / 128,935.80-193,403.70-100,942.20

Finding the Fourth Proportional to 128,935.80, 193,403.70 and 100,942.20

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Solution

The fourth proportional to 128,935.80, 193,403.70 and 100,942.20 is: 151,413.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,935.80 : 193,403.70 = 100,942.20 : x
  2. Step 2: Convert to fraction form
    128,935.80/193,403.70 = 100,942.20/x
  3. Step 3: Cross multiply
    128,935.80x = 193,403.70 × 100,942.20
  4. Step 4: Simplify right side
    128,935.80x = 19,522,594,966.14
  5. Step 5: Solve for x
    x = 19,522,594,966.14/128,935.80
  6. Step 6: Final answer
    x = 151,413.30

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1.5x scale

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.