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Finding the Fourth Proportional to 78,749.73, 108,672.26 and 42,940.44

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Solution

The fourth proportional to 78,749.73, 108,672.26 and 42,940.44 is: 59,256.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,749.73 : 108,672.26 = 42,940.44 : x
  2. Step 2: Convert to fraction form
    78,749.73/108,672.26 = 42,940.44/x
  3. Step 3: Cross multiply
    78,749.73x = 108,672.26 × 42,940.44
  4. Step 4: Simplify right side
    78,749.73x = 4,666,434,660.19
  5. Step 5: Solve for x
    x = 4,666,434,660.19/78,749.73
  6. Step 6: Final answer
    x = 59,256.52

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1.5x scale

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.