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Finding the Fourth Proportional to 78,544.31, 108,393.44 and 42,736.59

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Solution

The fourth proportional to 78,544.31, 108,393.44 and 42,736.59 is: 58,977.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,544.31 : 108,393.44 = 42,736.59 : x
  2. Step 2: Convert to fraction form
    78,544.31/108,393.44 = 42,736.59/x
  3. Step 3: Cross multiply
    78,544.31x = 108,393.44 × 42,736.59
  4. Step 4: Simplify right side
    78,544.31x = 4,632,365,790.29
  5. Step 5: Solve for x
    x = 4,632,365,790.29/78,544.31
  6. Step 6: Final answer
    x = 58,977.74

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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.