Home / 138,414.70-207,622.06-79,208.50

Finding the Fourth Proportional to 138,414.70, 207,622.06 and 79,208.50

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Solution

The fourth proportional to 138,414.70, 207,622.06 and 79,208.50 is: 118,812.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,414.70 : 207,622.06 = 79,208.50 : x
  2. Step 2: Convert to fraction form
    138,414.70/207,622.06 = 79,208.50/x
  3. Step 3: Cross multiply
    138,414.70x = 207,622.06 × 79,208.50
  4. Step 4: Simplify right side
    138,414.70x = 16,445,431,939.51
  5. Step 5: Solve for x
    x = 16,445,431,939.51/138,414.70
  6. Step 6: Final answer
    x = 118,812.76

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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.