Home / 111,210.30-166,815.45-71,811.90

Finding the Fourth Proportional to 111,210.30, 166,815.45 and 71,811.90

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Solution

The fourth proportional to 111,210.30, 166,815.45 and 71,811.90 is: 107,717.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,210.30 : 166,815.45 = 71,811.90 : x
  2. Step 2: Convert to fraction form
    111,210.30/166,815.45 = 71,811.90/x
  3. Step 3: Cross multiply
    111,210.30x = 166,815.45 × 71,811.90
  4. Step 4: Simplify right side
    111,210.30x = 11,979,334,413.86
  5. Step 5: Solve for x
    x = 11,979,334,413.86/111,210.30
  6. Step 6: Final answer
    x = 107,717.85

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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.