Home / 154,665.96-213,428.88-90,991.44

Finding the Fourth Proportional to 154,665.96, 213,428.88 and 90,991.44

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Solution

The fourth proportional to 154,665.96, 213,428.88 and 90,991.44 is: 125,562.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,665.96 : 213,428.88 = 90,991.44 : x
  2. Step 2: Convert to fraction form
    154,665.96/213,428.88 = 90,991.44/x
  3. Step 3: Cross multiply
    154,665.96x = 213,428.88 × 90,991.44
  4. Step 4: Simplify right side
    154,665.96x = 19,420,201,128.79
  5. Step 5: Solve for x
    x = 19,420,201,128.79/154,665.96
  6. Step 6: Final answer
    x = 125,562.22

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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.