Home / 100,905.40-139,243.19-55,580.85

Finding the Fourth Proportional to 100,905.40, 139,243.19 and 55,580.85

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Solution

The fourth proportional to 100,905.40, 139,243.19 and 55,580.85 is: 76,698.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,905.40 : 139,243.19 = 55,580.85 : x
  2. Step 2: Convert to fraction form
    100,905.40/139,243.19 = 55,580.85/x
  3. Step 3: Cross multiply
    100,905.40x = 139,243.19 × 55,580.85
  4. Step 4: Simplify right side
    100,905.40x = 7,739,254,579.01
  5. Step 5: Solve for x
    x = 7,739,254,579.01/100,905.40
  6. Step 6: Final answer
    x = 76,698.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.