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Finding the Fourth Proportional to 92,896.40, 139,344.60 and 86,675.60

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Solution

The fourth proportional to 92,896.40, 139,344.60 and 86,675.60 is: 130,013.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,896.40 : 139,344.60 = 86,675.60 : x
  2. Step 2: Convert to fraction form
    92,896.40/139,344.60 = 86,675.60/x
  3. Step 3: Cross multiply
    92,896.40x = 139,344.60 × 86,675.60
  4. Step 4: Simplify right side
    92,896.40x = 12,077,776,811.76
  5. Step 5: Solve for x
    x = 12,077,776,811.76/92,896.40
  6. Step 6: Final answer
    x = 130,013.40

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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.