Home / 190,282.36-285,450.20-77,978.54

Finding the Fourth Proportional to 190,282.36, 285,450.20 and 77,978.54

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Solution

The fourth proportional to 190,282.36, 285,450.20 and 77,978.54 is: 116,978.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,282.36 : 285,450.20 = 77,978.54 : x
  2. Step 2: Convert to fraction form
    190,282.36/285,450.20 = 77,978.54/x
  3. Step 3: Cross multiply
    190,282.36x = 285,450.20 × 77,978.54
  4. Step 4: Simplify right side
    190,282.36x = 22,258,989,838.71
  5. Step 5: Solve for x
    x = 22,258,989,838.71/190,282.36
  6. Step 6: Final answer
    x = 116,978.74

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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.