Home / 81,413.37-121,909.74-56,190.72

Finding the Fourth Proportional to 81,413.37, 121,909.74 and 56,190.72

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Solution

The fourth proportional to 81,413.37, 121,909.74 and 56,190.72 is: 84,140.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,413.37 : 121,909.74 = 56,190.72 : x
  2. Step 2: Convert to fraction form
    81,413.37/121,909.74 = 56,190.72/x
  3. Step 3: Cross multiply
    81,413.37x = 121,909.74 × 56,190.72
  4. Step 4: Simplify right side
    81,413.37x = 6,850,196,065.61
  5. Step 5: Solve for x
    x = 6,850,196,065.61/81,413.37
  6. Step 6: Final answer
    x = 84,140.92

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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.