Home / 138,420.90-207,620.55-54,164.70

Finding the Fourth Proportional to 138,420.90, 207,620.55 and 54,164.70

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Solution

The fourth proportional to 138,420.90, 207,620.55 and 54,164.70 is: 81,242.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,420.90 : 207,620.55 = 54,164.70 : x
  2. Step 2: Convert to fraction form
    138,420.90/207,620.55 = 54,164.70/x
  3. Step 3: Cross multiply
    138,420.90x = 207,620.55 × 54,164.70
  4. Step 4: Simplify right side
    138,420.90x = 11,245,704,804.59
  5. Step 5: Solve for x
    x = 11,245,704,804.59/138,420.90
  6. Step 6: Final answer
    x = 81,242.82

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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.