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Finding the Fourth Proportional to 154,609.94, 213,359.72 and 86,625.74

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Solution

The fourth proportional to 154,609.94, 213,359.72 and 86,625.74 is: 119,542.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,609.94 : 213,359.72 = 86,625.74 : x
  2. Step 2: Convert to fraction form
    154,609.94/213,359.72 = 86,625.74/x
  3. Step 3: Cross multiply
    154,609.94x = 213,359.72 × 86,625.74
  4. Step 4: Simplify right side
    154,609.94x = 18,482,443,631.19
  5. Step 5: Solve for x
    x = 18,482,443,631.19/154,609.94
  6. Step 6: Final answer
    x = 119,542.40

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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.