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Finding the Fourth Proportional to 70,672.80, 105,413.82 and 65,773.92

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Solution

The fourth proportional to 70,672.80, 105,413.82 and 65,773.92 is: 98,106.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,672.80 : 105,413.82 = 65,773.92 : x
  2. Step 2: Convert to fraction form
    70,672.80/105,413.82 = 65,773.92/x
  3. Step 3: Cross multiply
    70,672.80x = 105,413.82 × 65,773.92
  4. Step 4: Simplify right side
    70,672.80x = 6,933,480,163.57
  5. Step 5: Solve for x
    x = 6,933,480,163.57/70,672.80
  6. Step 6: Final answer
    x = 98,106.77

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.