Home / 190,000.78-285,000.99-90,106.51

Finding the Fourth Proportional to 190,000.78, 285,000.99 and 90,106.51

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Solution

The fourth proportional to 190,000.78, 285,000.99 and 90,106.51 is: 135,159.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,000.78 : 285,000.99 = 90,106.51 : x
  2. Step 2: Convert to fraction form
    190,000.78/285,000.99 = 90,106.51/x
  3. Step 3: Cross multiply
    190,000.78x = 285,000.99 × 90,106.51
  4. Step 4: Simplify right side
    190,000.78x = 25,680,444,555.44
  5. Step 5: Solve for x
    x = 25,680,444,555.44/190,000.78
  6. Step 6: Final answer
    x = 135,159.68

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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.