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Finding the Fourth Proportional to 120,756.64, 180,879.60 and 76,360.48

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Solution

The fourth proportional to 120,756.64, 180,879.60 and 76,360.48 is: 114,379.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,756.64 : 180,879.60 = 76,360.48 : x
  2. Step 2: Convert to fraction form
    120,756.64/180,879.60 = 76,360.48/x
  3. Step 3: Cross multiply
    120,756.64x = 180,879.60 × 76,360.48
  4. Step 4: Simplify right side
    120,756.64x = 13,812,053,078.21
  5. Step 5: Solve for x
    x = 13,812,053,078.21/120,756.64
  6. Step 6: Final answer
    x = 114,379.24

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1.5x scale

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.