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Finding the Fourth Proportional to 154,243.54, 212,866.94 and 86,266.84

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Solution

The fourth proportional to 154,243.54, 212,866.94 and 86,266.84 is: 119,054.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,243.54 : 212,866.94 = 86,266.84 : x
  2. Step 2: Convert to fraction form
    154,243.54/212,866.94 = 86,266.84/x
  3. Step 3: Cross multiply
    154,243.54x = 212,866.94 × 86,266.84
  4. Step 4: Simplify right side
    154,243.54x = 18,363,358,254.27
  5. Step 5: Solve for x
    x = 18,363,358,254.27/154,243.54
  6. Step 6: Final answer
    x = 119,054.31

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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.