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Finding the Fourth Proportional to 115,938.70, 162,664.10 and 115,938.70

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Solution

The fourth proportional to 115,938.70, 162,664.10 and 115,938.70 is: 162,664.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,938.70 : 162,664.10 = 115,938.70 : x
  2. Step 2: Convert to fraction form
    115,938.70/162,664.10 = 115,938.70/x
  3. Step 3: Cross multiply
    115,938.70x = 162,664.10 × 115,938.70
  4. Step 4: Simplify right side
    115,938.70x = 18,859,064,290.67
  5. Step 5: Solve for x
    x = 18,859,064,290.67/115,938.70
  6. Step 6: Final answer
    x = 162,664.10

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.