Home / 120,664.32-180,733.92-81,045.60

Finding the Fourth Proportional to 120,664.32, 180,733.92 and 81,045.60

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Solution

The fourth proportional to 120,664.32, 180,733.92 and 81,045.60 is: 121,392.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,664.32 : 180,733.92 = 81,045.60 : x
  2. Step 2: Convert to fraction form
    120,664.32/180,733.92 = 81,045.60/x
  3. Step 3: Cross multiply
    120,664.32x = 180,733.92 × 81,045.60
  4. Step 4: Simplify right side
    120,664.32x = 14,647,688,986.75
  5. Step 5: Solve for x
    x = 14,647,688,986.75/120,664.32
  6. Step 6: Final answer
    x = 121,392.05

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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.