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Finding the Fourth Proportional to 133,901.20, 200,981.40 and 81,413.20

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Solution

The fourth proportional to 133,901.20, 200,981.40 and 81,413.20 is: 122,198.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,901.20 : 200,981.40 = 81,413.20 : x
  2. Step 2: Convert to fraction form
    133,901.20/200,981.40 = 81,413.20/x
  3. Step 3: Cross multiply
    133,901.20x = 200,981.40 × 81,413.20
  4. Step 4: Simplify right side
    133,901.20x = 16,362,538,914.48
  5. Step 5: Solve for x
    x = 16,362,538,914.48/133,901.20
  6. Step 6: Final answer
    x = 122,198.60

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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.