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Finding the Fourth Proportional to 78,938.59, 108,936.83 and 43,130.82

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Solution

The fourth proportional to 78,938.59, 108,936.83 and 43,130.82 is: 59,521.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,938.59 : 108,936.83 = 43,130.82 : x
  2. Step 2: Convert to fraction form
    78,938.59/108,936.83 = 43,130.82/x
  3. Step 3: Cross multiply
    78,938.59x = 108,936.83 × 43,130.82
  4. Step 4: Simplify right side
    78,938.59x = 4,698,534,806.10
  5. Step 5: Solve for x
    x = 4,698,534,806.10/78,938.59
  6. Step 6: Final answer
    x = 59,521.39

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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.