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Finding the Fourth Proportional to 70,538.94, 105,811.87 and 28,413.33

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Solution

The fourth proportional to 70,538.94, 105,811.87 and 28,413.33 is: 42,621.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,538.94 : 105,811.87 = 28,413.33 : x
  2. Step 2: Convert to fraction form
    70,538.94/105,811.87 = 28,413.33/x
  3. Step 3: Cross multiply
    70,538.94x = 105,811.87 × 28,413.33
  4. Step 4: Simplify right side
    70,538.94x = 3,006,467,438.16
  5. Step 5: Solve for x
    x = 3,006,467,438.16/70,538.94
  6. Step 6: Final answer
    x = 42,621.39

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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.