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Finding the Fourth Proportional to 190,787.20, 286,180.80 and 120,745.60

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Solution

The fourth proportional to 190,787.20, 286,180.80 and 120,745.60 is: 181,118.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,787.20 : 286,180.80 = 120,745.60 : x
  2. Step 2: Convert to fraction form
    190,787.20/286,180.80 = 120,745.60/x
  3. Step 3: Cross multiply
    190,787.20x = 286,180.80 × 120,745.60
  4. Step 4: Simplify right side
    190,787.20x = 34,555,072,404.48
  5. Step 5: Solve for x
    x = 34,555,072,404.48/190,787.20
  6. Step 6: Final answer
    x = 181,118.40

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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.