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Finding the Fourth Proportional to 190,446.88, 285,580.78 and 70,420.90

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Solution

The fourth proportional to 190,446.88, 285,580.78 and 70,420.90 is: 105,598.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,446.88 : 285,580.78 = 70,420.90 : x
  2. Step 2: Convert to fraction form
    190,446.88/285,580.78 = 70,420.90/x
  3. Step 3: Cross multiply
    190,446.88x = 285,580.78 × 70,420.90
  4. Step 4: Simplify right side
    190,446.88x = 20,110,855,550.30
  5. Step 5: Solve for x
    x = 20,110,855,550.30/190,446.88
  6. Step 6: Final answer
    x = 105,598.24

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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.