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Finding the Fourth Proportional to 186,762.39, 280,318.55 and 86,991.45

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Solution

The fourth proportional to 186,762.39, 280,318.55 and 86,991.45 is: 130,568.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,762.39 : 280,318.55 = 86,991.45 : x
  2. Step 2: Convert to fraction form
    186,762.39/280,318.55 = 86,991.45/x
  3. Step 3: Cross multiply
    186,762.39x = 280,318.55 × 86,991.45
  4. Step 4: Simplify right side
    186,762.39x = 24,385,316,691.44
  5. Step 5: Solve for x
    x = 24,385,316,691.44/186,762.39
  6. Step 6: Final answer
    x = 130,568.67

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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.