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Finding the Fourth Proportional to 78,908.50, 108,893.73 and 43,098.60

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Solution

The fourth proportional to 78,908.50, 108,893.73 and 43,098.60 is: 59,476.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,908.50 : 108,893.73 = 43,098.60 : x
  2. Step 2: Convert to fraction form
    78,908.50/108,893.73 = 43,098.60/x
  3. Step 3: Cross multiply
    78,908.50x = 108,893.73 × 43,098.60
  4. Step 4: Simplify right side
    78,908.50x = 4,693,166,741.81
  5. Step 5: Solve for x
    x = 4,693,166,741.81/78,908.50
  6. Step 6: Final answer
    x = 59,476.06

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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.