Home / 190,563.20-285,979.98-78,345.80

Finding the Fourth Proportional to 190,563.20, 285,979.98 and 78,345.80

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Solution

The fourth proportional to 190,563.20, 285,979.98 and 78,345.80 is: 117,574.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,563.20 : 285,979.98 = 78,345.80 : x
  2. Step 2: Convert to fraction form
    190,563.20/285,979.98 = 78,345.80/x
  3. Step 3: Cross multiply
    190,563.20x = 285,979.98 × 78,345.80
  4. Step 4: Simplify right side
    190,563.20x = 22,405,330,317.08
  5. Step 5: Solve for x
    x = 22,405,330,317.08/190,563.20
  6. Step 6: Final answer
    x = 117,574.28

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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.