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Finding the Fourth Proportional to 78,467.94, 108,287.88 and 42,660.36

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Solution

The fourth proportional to 78,467.94, 108,287.88 and 42,660.36 is: 58,872.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,467.94 : 108,287.88 = 42,660.36 : x
  2. Step 2: Convert to fraction form
    78,467.94/108,287.88 = 42,660.36/x
  3. Step 3: Cross multiply
    78,467.94x = 108,287.88 × 42,660.36
  4. Step 4: Simplify right side
    78,467.94x = 4,619,599,944.44
  5. Step 5: Solve for x
    x = 4,619,599,944.44/78,467.94
  6. Step 6: Final answer
    x = 58,872.45

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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.