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Finding the Fourth Proportional to 72,413.60, 108,620.40 and 61,478.60

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Solution

The fourth proportional to 72,413.60, 108,620.40 and 61,478.60 is: 92,217.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,413.60 : 108,620.40 = 61,478.60 : x
  2. Step 2: Convert to fraction form
    72,413.60/108,620.40 = 61,478.60/x
  3. Step 3: Cross multiply
    72,413.60x = 108,620.40 × 61,478.60
  4. Step 4: Simplify right side
    72,413.60x = 6,677,830,123.44
  5. Step 5: Solve for x
    x = 6,677,830,123.44/72,413.60
  6. Step 6: Final answer
    x = 92,217.90

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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.