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Finding the Fourth Proportional to 92,912.55, 139,368.83 and 64,918.95

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Solution

The fourth proportional to 92,912.55, 139,368.83 and 64,918.95 is: 97,378.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,912.55 : 139,368.83 = 64,918.95 : x
  2. Step 2: Convert to fraction form
    92,912.55/139,368.83 = 64,918.95/x
  3. Step 3: Cross multiply
    92,912.55x = 139,368.83 × 64,918.95
  4. Step 4: Simplify right side
    92,912.55x = 9,047,677,781.73
  5. Step 5: Solve for x
    x = 9,047,677,781.73/92,912.55
  6. Step 6: Final answer
    x = 97,378.43

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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.