Home / 190,986.12-286,235.64-78,537.78

Finding the Fourth Proportional to 190,986.12, 286,235.64 and 78,537.78

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Solution

The fourth proportional to 190,986.12, 286,235.64 and 78,537.78 is: 117,706.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,986.12 : 286,235.64 = 78,537.78 : x
  2. Step 2: Convert to fraction form
    190,986.12/286,235.64 = 78,537.78/x
  3. Step 3: Cross multiply
    190,986.12x = 286,235.64 × 78,537.78
  4. Step 4: Simplify right side
    190,986.12x = 22,480,311,722.48
  5. Step 5: Solve for x
    x = 22,480,311,722.48/190,986.12
  6. Step 6: Final answer
    x = 117,706.52

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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.