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Finding the Fourth Proportional to 151,173.87, 208,628.55 and 86,653.84

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Solution

The fourth proportional to 151,173.87, 208,628.55 and 86,653.84 is: 119,587.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,173.87 : 208,628.55 = 86,653.84 : x
  2. Step 2: Convert to fraction form
    151,173.87/208,628.55 = 86,653.84/x
  3. Step 3: Cross multiply
    151,173.87x = 208,628.55 × 86,653.84
  4. Step 4: Simplify right side
    151,173.87x = 18,078,464,991.13
  5. Step 5: Solve for x
    x = 18,078,464,991.13/151,173.87
  6. Step 6: Final answer
    x = 119,587.23

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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.