Home / 105,705.18-158,450.31-66,289.77

Finding the Fourth Proportional to 105,705.18, 158,450.31 and 66,289.77

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Solution

The fourth proportional to 105,705.18, 158,450.31 and 66,289.77 is: 99,367.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,705.18 : 158,450.31 = 66,289.77 : x
  2. Step 2: Convert to fraction form
    105,705.18/158,450.31 = 66,289.77/x
  3. Step 3: Cross multiply
    105,705.18x = 158,450.31 × 66,289.77
  4. Step 4: Simplify right side
    105,705.18x = 10,503,634,606.33
  5. Step 5: Solve for x
    x = 10,503,634,606.33/105,705.18
  6. Step 6: Final answer
    x = 99,367.26

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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.