Home / 78,660.48-118,016.64-28,755.84

Finding the Fourth Proportional to 78,660.48, 118,016.64 and 28,755.84

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Solution

The fourth proportional to 78,660.48, 118,016.64 and 28,755.84 is: 43,143.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,660.48 : 118,016.64 = 28,755.84 : x
  2. Step 2: Convert to fraction form
    78,660.48/118,016.64 = 28,755.84/x
  3. Step 3: Cross multiply
    78,660.48x = 118,016.64 × 28,755.84
  4. Step 4: Simplify right side
    78,660.48x = 3,393,667,617.18
  5. Step 5: Solve for x
    x = 3,393,667,617.18/78,660.48
  6. Step 6: Final answer
    x = 43,143.24

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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.