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Finding the Fourth Proportional to 158,385.87, 218,577.95 and 86,765.88

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Solution

The fourth proportional to 158,385.87, 218,577.95 and 86,765.88 is: 119,739.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,385.87 : 218,577.95 = 86,765.88 : x
  2. Step 2: Convert to fraction form
    158,385.87/218,577.95 = 86,765.88/x
  3. Step 3: Cross multiply
    158,385.87x = 218,577.95 × 86,765.88
  4. Step 4: Simplify right side
    158,385.87x = 18,965,106,653.63
  5. Step 5: Solve for x
    x = 18,965,106,653.63/158,385.87
  6. Step 6: Final answer
    x = 119,739.89

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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.