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Finding the Fourth Proportional to 78,858.21, 108,826.75 and 43,050.54

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Solution

The fourth proportional to 78,858.21, 108,826.75 and 43,050.54 is: 59,411.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,858.21 : 108,826.75 = 43,050.54 : x
  2. Step 2: Convert to fraction form
    78,858.21/108,826.75 = 43,050.54/x
  3. Step 3: Cross multiply
    78,858.21x = 108,826.75 × 43,050.54
  4. Step 4: Simplify right side
    78,858.21x = 4,685,050,353.95
  5. Step 5: Solve for x
    x = 4,685,050,353.95/78,858.21
  6. Step 6: Final answer
    x = 59,411.07

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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.