Home / 218,845.96-328,285.02-78,605.80

Finding the Fourth Proportional to 218,845.96, 328,285.02 and 78,605.80

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Solution

The fourth proportional to 218,845.96, 328,285.02 and 78,605.80 is: 117,914.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,845.96 : 328,285.02 = 78,605.80 : x
  2. Step 2: Convert to fraction form
    218,845.96/328,285.02 = 78,605.80/x
  3. Step 3: Cross multiply
    218,845.96x = 328,285.02 × 78,605.80
  4. Step 4: Simplify right side
    218,845.96x = 25,805,106,625.12
  5. Step 5: Solve for x
    x = 25,805,106,625.12/218,845.96
  6. Step 6: Final answer
    x = 117,914.48

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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.