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Finding the Fourth Proportional to 128,002.90, 192,004.35 and 120,745.30

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Solution

The fourth proportional to 128,002.90, 192,004.35 and 120,745.30 is: 181,117.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,002.90 : 192,004.35 = 120,745.30 : x
  2. Step 2: Convert to fraction form
    128,002.90/192,004.35 = 120,745.30/x
  3. Step 3: Cross multiply
    128,002.90x = 192,004.35 × 120,745.30
  4. Step 4: Simplify right side
    128,002.90x = 23,183,622,842.06
  5. Step 5: Solve for x
    x = 23,183,622,842.06/128,002.90
  6. Step 6: Final answer
    x = 181,117.95

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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.