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Finding the Fourth Proportional to 236,436.80, 354,687.60 and 78,648.80

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Solution

The fourth proportional to 236,436.80, 354,687.60 and 78,648.80 is: 117,983.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,436.80 : 354,687.60 = 78,648.80 : x
  2. Step 2: Convert to fraction form
    236,436.80/354,687.60 = 78,648.80/x
  3. Step 3: Cross multiply
    236,436.80x = 354,687.60 × 78,648.80
  4. Step 4: Simplify right side
    236,436.80x = 27,895,754,114.88
  5. Step 5: Solve for x
    x = 27,895,754,114.88/236,436.80
  6. Step 6: Final answer
    x = 117,983.98

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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.