Home / 138,970.45-208,734.60-82,919.93

Finding the Fourth Proportional to 138,970.45, 208,734.60 and 82,919.93

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Solution

The fourth proportional to 138,970.45, 208,734.60 and 82,919.93 is: 124,546.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,970.45 : 208,734.60 = 82,919.93 : x
  2. Step 2: Convert to fraction form
    138,970.45/208,734.60 = 82,919.93/x
  3. Step 3: Cross multiply
    138,970.45x = 208,734.60 × 82,919.93
  4. Step 4: Simplify right side
    138,970.45x = 17,308,258,420.58
  5. Step 5: Solve for x
    x = 17,308,258,420.58/138,970.45
  6. Step 6: Final answer
    x = 124,546.32

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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.