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Finding the Fourth Proportional to 158,417.60, 218,616.36 and 86,800.40

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Solution

The fourth proportional to 158,417.60, 218,616.36 and 86,800.40 is: 119,784.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,417.60 : 218,616.36 = 86,800.40 : x
  2. Step 2: Convert to fraction form
    158,417.60/218,616.36 = 86,800.40/x
  3. Step 3: Cross multiply
    158,417.60x = 218,616.36 × 86,800.40
  4. Step 4: Simplify right side
    158,417.60x = 18,975,987,494.54
  5. Step 5: Solve for x
    x = 18,975,987,494.54/158,417.60
  6. Step 6: Final answer
    x = 119,784.59

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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.