Home / 81,534.49-122,313.89-28,939.57

Finding the Fourth Proportional to 81,534.49, 122,313.89 and 28,939.57

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Solution

The fourth proportional to 81,534.49, 122,313.89 and 28,939.57 is: 43,413.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,534.49 : 122,313.89 = 28,939.57 : x
  2. Step 2: Convert to fraction form
    81,534.49/122,313.89 = 28,939.57/x
  3. Step 3: Cross multiply
    81,534.49x = 122,313.89 × 28,939.57
  4. Step 4: Simplify right side
    81,534.49x = 3,539,711,148.19
  5. Step 5: Solve for x
    x = 3,539,711,148.19/81,534.49
  6. Step 6: Final answer
    x = 43,413.67

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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.