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Finding the Fourth Proportional to 131,963.20, 197,815.20 and 65,413.60

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Solution

The fourth proportional to 131,963.20, 197,815.20 and 65,413.60 is: 98,056.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,963.20 : 197,815.20 = 65,413.60 : x
  2. Step 2: Convert to fraction form
    131,963.20/197,815.20 = 65,413.60/x
  3. Step 3: Cross multiply
    131,963.20x = 197,815.20 × 65,413.60
  4. Step 4: Simplify right side
    131,963.20x = 12,939,804,366.72
  5. Step 5: Solve for x
    x = 12,939,804,366.72/131,963.20
  6. Step 6: Final answer
    x = 98,056.16

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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.