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Finding the Fourth Proportional to 158,456.32, 218,668.44 and 86,836.16

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Solution

The fourth proportional to 158,456.32, 218,668.44 and 86,836.16 is: 119,833.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,456.32 : 218,668.44 = 86,836.16 : x
  2. Step 2: Convert to fraction form
    158,456.32/218,668.44 = 86,836.16/x
  3. Step 3: Cross multiply
    158,456.32x = 218,668.44 × 86,836.16
  4. Step 4: Simplify right side
    158,456.32x = 18,988,327,642.79
  5. Step 5: Solve for x
    x = 18,988,327,642.79/158,456.32
  6. Step 6: Final answer
    x = 119,833.20

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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.