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Finding the Fourth Proportional to 186,189.63, 279,065.75 and 86,138.48

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Solution

The fourth proportional to 186,189.63, 279,065.75 and 86,138.48 is: 129,106.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,189.63 : 279,065.75 = 86,138.48 : x
  2. Step 2: Convert to fraction form
    186,189.63/279,065.75 = 86,138.48/x
  3. Step 3: Cross multiply
    186,189.63x = 279,065.75 × 86,138.48
  4. Step 4: Simplify right side
    186,189.63x = 24,038,299,094.37
  5. Step 5: Solve for x
    x = 24,038,299,094.37/186,189.63
  6. Step 6: Final answer
    x = 129,106.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.