Home / 190,435.08-285,586.78-78,083.40

Finding the Fourth Proportional to 190,435.08, 285,586.78 and 78,083.40

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Solution

The fourth proportional to 190,435.08, 285,586.78 and 78,083.40 is: 117,098.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,435.08 : 285,586.78 = 78,083.40 : x
  2. Step 2: Convert to fraction form
    190,435.08/285,586.78 = 78,083.40/x
  3. Step 3: Cross multiply
    190,435.08x = 285,586.78 × 78,083.40
  4. Step 4: Simplify right side
    190,435.08x = 22,299,586,777.45
  5. Step 5: Solve for x
    x = 22,299,586,777.45/190,435.08
  6. Step 6: Final answer
    x = 117,098.10

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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.