Home / 121,086.90-181,418.94-78,899.67

Finding the Fourth Proportional to 121,086.90, 181,418.94 and 78,899.67

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Solution

The fourth proportional to 121,086.90, 181,418.94 and 78,899.67 is: 118,211.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,086.90 : 181,418.94 = 78,899.67 : x
  2. Step 2: Convert to fraction form
    121,086.90/181,418.94 = 78,899.67/x
  3. Step 3: Cross multiply
    121,086.90x = 181,418.94 × 78,899.67
  4. Step 4: Simplify right side
    121,086.90x = 14,313,894,497.75
  5. Step 5: Solve for x
    x = 14,313,894,497.75/121,086.90
  6. Step 6: Final answer
    x = 118,211.75

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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.