Home / 120,144.36-180,098.84-66,861.75

Finding the Fourth Proportional to 120,144.36, 180,098.84 and 66,861.75

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Solution

The fourth proportional to 120,144.36, 180,098.84 and 66,861.75 is: 100,227.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,144.36 : 180,098.84 = 66,861.75 : x
  2. Step 2: Convert to fraction form
    120,144.36/180,098.84 = 66,861.75/x
  3. Step 3: Cross multiply
    120,144.36x = 180,098.84 × 66,861.75
  4. Step 4: Simplify right side
    120,144.36x = 12,041,724,457.90
  5. Step 5: Solve for x
    x = 12,041,724,457.90/120,144.36
  6. Step 6: Final answer
    x = 100,227.13

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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.