Home / 120,629.45-180,856.70-81,088.49

Finding the Fourth Proportional to 120,629.45, 180,856.70 and 81,088.49

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Solution

The fourth proportional to 120,629.45, 180,856.70 and 81,088.49 is: 121,573.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,629.45 : 180,856.70 = 81,088.49 : x
  2. Step 2: Convert to fraction form
    120,629.45/180,856.70 = 81,088.49/x
  3. Step 3: Cross multiply
    120,629.45x = 180,856.70 × 81,088.49
  4. Step 4: Simplify right side
    120,629.45x = 14,665,396,303.94
  5. Step 5: Solve for x
    x = 14,665,396,303.94/120,629.45
  6. Step 6: Final answer
    x = 121,573.93

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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.