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Finding the Fourth Proportional to 86,913.70, 122,029.10 and 86,913.70

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Solution

The fourth proportional to 86,913.70, 122,029.10 and 86,913.70 is: 122,029.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,913.70 : 122,029.10 = 86,913.70 : x
  2. Step 2: Convert to fraction form
    86,913.70/122,029.10 = 86,913.70/x
  3. Step 3: Cross multiply
    86,913.70x = 122,029.10 × 86,913.70
  4. Step 4: Simplify right side
    86,913.70x = 10,606,000,588.67
  5. Step 5: Solve for x
    x = 10,606,000,588.67/86,913.70
  6. Step 6: Final answer
    x = 122,029.10

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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.