Home / 107,921.40-161,622.90-103,255.80

Finding the Fourth Proportional to 107,921.40, 161,622.90 and 103,255.80

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Solution

The fourth proportional to 107,921.40, 161,622.90 and 103,255.80 is: 154,635.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,921.40 : 161,622.90 = 103,255.80 : x
  2. Step 2: Convert to fraction form
    107,921.40/161,622.90 = 103,255.80/x
  3. Step 3: Cross multiply
    107,921.40x = 161,622.90 × 103,255.80
  4. Step 4: Simplify right side
    107,921.40x = 16,688,501,837.82
  5. Step 5: Solve for x
    x = 16,688,501,837.82/107,921.40
  6. Step 6: Final answer
    x = 154,635.71

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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.