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Finding the Fourth Proportional to 66,413.60, 99,620.40 and 61,344.80

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Solution

The fourth proportional to 66,413.60, 99,620.40 and 61,344.80 is: 92,017.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,413.60 : 99,620.40 = 61,344.80 : x
  2. Step 2: Convert to fraction form
    66,413.60/99,620.40 = 61,344.80/x
  3. Step 3: Cross multiply
    66,413.60x = 99,620.40 × 61,344.80
  4. Step 4: Simplify right side
    66,413.60x = 6,111,193,513.92
  5. Step 5: Solve for x
    x = 6,111,193,513.92/66,413.60
  6. Step 6: Final answer
    x = 92,017.20

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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.