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Finding the Fourth Proportional to 103,643.04, 155,413.44 and 43,660.56

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Solution

The fourth proportional to 103,643.04, 155,413.44 and 43,660.56 is: 65,469.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,643.04 : 155,413.44 = 43,660.56 : x
  2. Step 2: Convert to fraction form
    103,643.04/155,413.44 = 43,660.56/x
  3. Step 3: Cross multiply
    103,643.04x = 155,413.44 × 43,660.56
  4. Step 4: Simplify right side
    103,643.04x = 6,785,437,821.93
  5. Step 5: Solve for x
    x = 6,785,437,821.93/103,643.04
  6. Step 6: Final answer
    x = 65,469.31

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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.