Home / 190,780.40-263,288.90-105,898.88

Finding the Fourth Proportional to 190,780.40, 263,288.90 and 105,898.88

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Solution

The fourth proportional to 190,780.40, 263,288.90 and 105,898.88 is: 146,147.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,780.40 : 263,288.90 = 105,898.88 : x
  2. Step 2: Convert to fraction form
    190,780.40/263,288.90 = 105,898.88/x
  3. Step 3: Cross multiply
    190,780.40x = 263,288.90 × 105,898.88
  4. Step 4: Simplify right side
    190,780.40x = 27,881,999,626.43
  5. Step 5: Solve for x
    x = 27,881,999,626.43/190,780.40
  6. Step 6: Final answer
    x = 146,147.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.