Home / 118,936.60-164,140.10-78,579.56

Finding the Fourth Proportional to 118,936.60, 164,140.10 and 78,579.56

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Solution

The fourth proportional to 118,936.60, 164,140.10 and 78,579.56 is: 108,444.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,936.60 : 164,140.10 = 78,579.56 : x
  2. Step 2: Convert to fraction form
    118,936.60/164,140.10 = 78,579.56/x
  3. Step 3: Cross multiply
    118,936.60x = 164,140.10 × 78,579.56
  4. Step 4: Simplify right side
    118,936.60x = 12,898,056,836.36
  5. Step 5: Solve for x
    x = 12,898,056,836.36/118,936.60
  6. Step 6: Final answer
    x = 108,444.81

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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.