Home / 190,451.42-285,636.14-78,021.40

Finding the Fourth Proportional to 190,451.42, 285,636.14 and 78,021.40

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Solution

The fourth proportional to 190,451.42, 285,636.14 and 78,021.40 is: 117,015.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,451.42 : 285,636.14 = 78,021.40 : x
  2. Step 2: Convert to fraction form
    190,451.42/285,636.14 = 78,021.40/x
  3. Step 3: Cross multiply
    190,451.42x = 285,636.14 × 78,021.40
  4. Step 4: Simplify right side
    190,451.42x = 22,285,731,533.40
  5. Step 5: Solve for x
    x = 22,285,731,533.40/190,451.42
  6. Step 6: Final answer
    x = 117,015.31

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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.