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Finding the Fourth Proportional to 78,893.40, 108,869.70 and 43,083.36

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Solution

The fourth proportional to 78,893.40, 108,869.70 and 43,083.36 is: 59,453.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,893.40 : 108,869.70 = 43,083.36 : x
  2. Step 2: Convert to fraction form
    78,893.40/108,869.70 = 43,083.36/x
  3. Step 3: Cross multiply
    78,893.40x = 108,869.70 × 43,083.36
  4. Step 4: Simplify right side
    78,893.40x = 4,690,472,478.19
  5. Step 5: Solve for x
    x = 4,690,472,478.19/78,893.40
  6. Step 6: Final answer
    x = 59,453.29

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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.