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Finding the Fourth Proportional to 78,869.58, 108,840.20 and 43,059.60

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Solution

The fourth proportional to 78,869.58, 108,840.20 and 43,059.60 is: 59,422.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,869.58 : 108,840.20 = 43,059.60 : x
  2. Step 2: Convert to fraction form
    78,869.58/108,840.20 = 43,059.60/x
  3. Step 3: Cross multiply
    78,869.58x = 108,840.20 × 43,059.60
  4. Step 4: Simplify right side
    78,869.58x = 4,686,615,260.62
  5. Step 5: Solve for x
    x = 4,686,615,260.62/78,869.58
  6. Step 6: Final answer
    x = 59,422.34

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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.