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Finding the Fourth Proportional to 122,413.52, 168,975.24 and 72,154.64

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Solution

The fourth proportional to 122,413.52, 168,975.24 and 72,154.64 is: 99,599.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,413.52 : 168,975.24 = 72,154.64 : x
  2. Step 2: Convert to fraction form
    122,413.52/168,975.24 = 72,154.64/x
  3. Step 3: Cross multiply
    122,413.52x = 168,975.24 × 72,154.64
  4. Step 4: Simplify right side
    122,413.52x = 12,192,347,611.11
  5. Step 5: Solve for x
    x = 12,192,347,611.11/122,413.52
  6. Step 6: Final answer
    x = 99,599.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.