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Finding the Fourth Proportional to 86,207.59, 118,948.65 and 50,390.67

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Solution

The fourth proportional to 86,207.59, 118,948.65 and 50,390.67 is: 69,528.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,207.59 : 118,948.65 = 50,390.67 : x
  2. Step 2: Convert to fraction form
    86,207.59/118,948.65 = 50,390.67/x
  3. Step 3: Cross multiply
    86,207.59x = 118,948.65 × 50,390.67
  4. Step 4: Simplify right side
    86,207.59x = 5,993,902,709.64
  5. Step 5: Solve for x
    x = 5,993,902,709.64/86,207.59
  6. Step 6: Final answer
    x = 69,528.71

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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.