Home / 139,129.57-208,414.48-105,453.18

Finding the Fourth Proportional to 139,129.57, 208,414.48 and 105,453.18

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Solution

The fourth proportional to 139,129.57, 208,414.48 and 105,453.18 is: 157,967.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,129.57 : 208,414.48 = 105,453.18 : x
  2. Step 2: Convert to fraction form
    139,129.57/208,414.48 = 105,453.18/x
  3. Step 3: Cross multiply
    139,129.57x = 208,414.48 × 105,453.18
  4. Step 4: Simplify right side
    139,129.57x = 21,977,970,342.60
  5. Step 5: Solve for x
    x = 21,977,970,342.60/139,129.57
  6. Step 6: Final answer
    x = 157,967.65

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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.