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Finding the Fourth Proportional to 122,405.60, 183,219.60 and 87,413.60

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Solution

The fourth proportional to 122,405.60, 183,219.60 and 87,413.60 is: 130,842.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,405.60 : 183,219.60 = 87,413.60 : x
  2. Step 2: Convert to fraction form
    122,405.60/183,219.60 = 87,413.60/x
  3. Step 3: Cross multiply
    122,405.60x = 183,219.60 × 87,413.60
  4. Step 4: Simplify right side
    122,405.60x = 16,015,884,826.56
  5. Step 5: Solve for x
    x = 16,015,884,826.56/122,405.60
  6. Step 6: Final answer
    x = 130,842.75

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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.