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Finding the Fourth Proportional to 92,938.50, 128,196.61 and 74,120.58

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Solution

The fourth proportional to 92,938.50, 128,196.61 and 74,120.58 is: 102,239.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,938.50 : 128,196.61 = 74,120.58 : x
  2. Step 2: Convert to fraction form
    92,938.50/128,196.61 = 74,120.58/x
  3. Step 3: Cross multiply
    92,938.50x = 128,196.61 × 74,120.58
  4. Step 4: Simplify right side
    92,938.50x = 9,502,006,901.93
  5. Step 5: Solve for x
    x = 9,502,006,901.93/92,938.50
  6. Step 6: Final answer
    x = 102,239.73

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.