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Finding the Fourth Proportional to 236,426.80, 354,672.60 and 78,638.80

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Solution

The fourth proportional to 236,426.80, 354,672.60 and 78,638.80 is: 117,968.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,426.80 : 354,672.60 = 78,638.80 : x
  2. Step 2: Convert to fraction form
    236,426.80/354,672.60 = 78,638.80/x
  3. Step 3: Cross multiply
    236,426.80x = 354,672.60 × 78,638.80
  4. Step 4: Simplify right side
    236,426.80x = 27,891,027,656.88
  5. Step 5: Solve for x
    x = 27,891,027,656.88/236,426.80
  6. Step 6: Final answer
    x = 117,968.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.