Home / 105,734.70-145,920.63-69,861.78

Finding the Fourth Proportional to 105,734.70, 145,920.63 and 69,861.78

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Solution

The fourth proportional to 105,734.70, 145,920.63 and 69,861.78 is: 96,413.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,734.70 : 145,920.63 = 69,861.78 : x
  2. Step 2: Convert to fraction form
    105,734.70/145,920.63 = 69,861.78/x
  3. Step 3: Cross multiply
    105,734.70x = 145,920.63 × 69,861.78
  4. Step 4: Simplify right side
    105,734.70x = 10,194,274,950.52
  5. Step 5: Solve for x
    x = 10,194,274,950.52/105,734.70
  6. Step 6: Final answer
    x = 96,413.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.