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Finding the Fourth Proportional to 78,858.42, 108,827.20 and 43,050.36

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Solution

The fourth proportional to 78,858.42, 108,827.20 and 43,050.36 is: 59,410.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,858.42 : 108,827.20 = 43,050.36 : x
  2. Step 2: Convert to fraction form
    78,858.42/108,827.20 = 43,050.36/x
  3. Step 3: Cross multiply
    78,858.42x = 108,827.20 × 43,050.36
  4. Step 4: Simplify right side
    78,858.42x = 4,685,050,137.79
  5. Step 5: Solve for x
    x = 4,685,050,137.79/78,858.42
  6. Step 6: Final answer
    x = 59,410.91

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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.