Home / 118,936.10-164,139.40-78,579.06

Finding the Fourth Proportional to 118,936.10, 164,139.40 and 78,579.06

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Solution

The fourth proportional to 118,936.10, 164,139.40 and 78,579.06 is: 108,444.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,936.10 : 164,139.40 = 78,579.06 : x
  2. Step 2: Convert to fraction form
    118,936.10/164,139.40 = 78,579.06/x
  3. Step 3: Cross multiply
    118,936.10x = 164,139.40 × 78,579.06
  4. Step 4: Simplify right side
    118,936.10x = 12,897,919,760.96
  5. Step 5: Solve for x
    x = 12,897,919,760.96/118,936.10
  6. Step 6: Final answer
    x = 108,444.11

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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.