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Finding the Fourth Proportional to 78,836.70, 108,793.87 and 43,026.40

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Solution

The fourth proportional to 78,836.70, 108,793.87 and 43,026.40 is: 59,376.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,836.70 : 108,793.87 = 43,026.40 : x
  2. Step 2: Convert to fraction form
    78,836.70/108,793.87 = 43,026.40/x
  3. Step 3: Cross multiply
    78,836.70x = 108,793.87 × 43,026.40
  4. Step 4: Simplify right side
    78,836.70x = 4,681,008,596.59
  5. Step 5: Solve for x
    x = 4,681,008,596.59/78,836.70
  6. Step 6: Final answer
    x = 59,376.01

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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.