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Finding the Fourth Proportional to 78,908.95, 108,896.70 and 43,099.56

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Solution

The fourth proportional to 78,908.95, 108,896.70 and 43,099.56 is: 59,478.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,908.95 : 108,896.70 = 43,099.56 : x
  2. Step 2: Convert to fraction form
    78,908.95/108,896.70 = 43,099.56/x
  3. Step 3: Cross multiply
    78,908.95x = 108,896.70 × 43,099.56
  4. Step 4: Simplify right side
    78,908.95x = 4,693,400,017.08
  5. Step 5: Solve for x
    x = 4,693,400,017.08/78,908.95
  6. Step 6: Final answer
    x = 59,478.68

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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.