Home / 111,518.20-167,277.30-78,275.80

Finding the Fourth Proportional to 111,518.20, 167,277.30 and 78,275.80

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Solution

The fourth proportional to 111,518.20, 167,277.30 and 78,275.80 is: 117,413.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,518.20 : 167,277.30 = 78,275.80 : x
  2. Step 2: Convert to fraction form
    111,518.20/167,277.30 = 78,275.80/x
  3. Step 3: Cross multiply
    111,518.20x = 167,277.30 × 78,275.80
  4. Step 4: Simplify right side
    111,518.20x = 13,093,764,479.34
  5. Step 5: Solve for x
    x = 13,093,764,479.34/111,518.20
  6. Step 6: Final answer
    x = 117,413.70

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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.