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Finding the Fourth Proportional to 153,751.62, 212,176.89 and 86,683.14

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Solution

The fourth proportional to 153,751.62, 212,176.89 and 86,683.14 is: 119,622.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,751.62 : 212,176.89 = 86,683.14 : x
  2. Step 2: Convert to fraction form
    153,751.62/212,176.89 = 86,683.14/x
  3. Step 3: Cross multiply
    153,751.62x = 212,176.89 × 86,683.14
  4. Step 4: Simplify right side
    153,751.62x = 18,392,159,060.63
  5. Step 5: Solve for x
    x = 18,392,159,060.63/153,751.62
  6. Step 6: Final answer
    x = 119,622.54

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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.