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Finding the Fourth Proportional to 78,958.59, 108,961.05 and 43,148.81

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Solution

The fourth proportional to 78,958.59, 108,961.05 and 43,148.81 is: 59,544.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,958.59 : 108,961.05 = 43,148.81 : x
  2. Step 2: Convert to fraction form
    78,958.59/108,961.05 = 43,148.81/x
  3. Step 3: Cross multiply
    78,958.59x = 108,961.05 × 43,148.81
  4. Step 4: Simplify right side
    78,958.59x = 4,701,539,643.85
  5. Step 5: Solve for x
    x = 4,701,539,643.85/78,958.59
  6. Step 6: Final answer
    x = 59,544.37

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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.