Home / 72,930.20-109,413.75-20,339.67

Finding the Fourth Proportional to 72,930.20, 109,413.75 and 20,339.67

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Solution

The fourth proportional to 72,930.20, 109,413.75 and 20,339.67 is: 30,514.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,930.20 : 109,413.75 = 20,339.67 : x
  2. Step 2: Convert to fraction form
    72,930.20/109,413.75 = 20,339.67/x
  3. Step 3: Cross multiply
    72,930.20x = 109,413.75 × 20,339.67
  4. Step 4: Simplify right side
    72,930.20x = 2,225,439,568.46
  5. Step 5: Solve for x
    x = 2,225,439,568.46/72,930.20
  6. Step 6: Final answer
    x = 30,514.65

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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.