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Finding the Fourth Proportional to 158,416.39, 218,614.58 and 86,799.13

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Solution

The fourth proportional to 158,416.39, 218,614.58 and 86,799.13 is: 119,782.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,416.39 : 218,614.58 = 86,799.13 : x
  2. Step 2: Convert to fraction form
    158,416.39/218,614.58 = 86,799.13/x
  3. Step 3: Cross multiply
    158,416.39x = 218,614.58 × 86,799.13
  4. Step 4: Simplify right side
    158,416.39x = 18,975,554,915.32
  5. Step 5: Solve for x
    x = 18,975,554,915.32/158,416.39
  6. Step 6: Final answer
    x = 119,782.78

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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.