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Finding the Fourth Proportional to 158,533.85, 218,776.65 and 86,912.33

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Solution

The fourth proportional to 158,533.85, 218,776.65 and 86,912.33 is: 119,938.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,533.85 : 218,776.65 = 86,912.33 : x
  2. Step 2: Convert to fraction form
    158,533.85/218,776.65 = 86,912.33/x
  3. Step 3: Cross multiply
    158,533.85x = 218,776.65 × 86,912.33
  4. Step 4: Simplify right side
    158,533.85x = 19,014,388,401.09
  5. Step 5: Solve for x
    x = 19,014,388,401.09/158,533.85
  6. Step 6: Final answer
    x = 119,938.98

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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.