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Finding the Fourth Proportional to 117,856.95, 162,629.40 and 69,455.76

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Solution

The fourth proportional to 117,856.95, 162,629.40 and 69,455.76 is: 95,841.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,856.95 : 162,629.40 = 69,455.76 : x
  2. Step 2: Convert to fraction form
    117,856.95/162,629.40 = 69,455.76/x
  3. Step 3: Cross multiply
    117,856.95x = 162,629.40 × 69,455.76
  4. Step 4: Simplify right side
    117,856.95x = 11,295,548,575.34
  5. Step 5: Solve for x
    x = 11,295,548,575.34/117,856.95
  6. Step 6: Final answer
    x = 95,841.18

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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.