Home / 121,413.40-181,925.70-79,811.80

Finding the Fourth Proportional to 121,413.40, 181,925.70 and 79,811.80

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Solution

The fourth proportional to 121,413.40, 181,925.70 and 79,811.80 is: 119,589.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,413.40 : 181,925.70 = 79,811.80 : x
  2. Step 2: Convert to fraction form
    121,413.40/181,925.70 = 79,811.80/x
  3. Step 3: Cross multiply
    121,413.40x = 181,925.70 × 79,811.80
  4. Step 4: Simplify right side
    121,413.40x = 14,519,817,583.26
  5. Step 5: Solve for x
    x = 14,519,817,583.26/121,413.40
  6. Step 6: Final answer
    x = 119,589.91

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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.