Home / 100,898.06-139,239.36-58,481.20

Finding the Fourth Proportional to 100,898.06, 139,239.36 and 58,481.20

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Solution

The fourth proportional to 100,898.06, 139,239.36 and 58,481.20 is: 80,704.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,898.06 : 139,239.36 = 58,481.20 : x
  2. Step 2: Convert to fraction form
    100,898.06/139,239.36 = 58,481.20/x
  3. Step 3: Cross multiply
    100,898.06x = 139,239.36 × 58,481.20
  4. Step 4: Simplify right side
    100,898.06x = 8,142,884,511.93
  5. Step 5: Solve for x
    x = 8,142,884,511.93/100,898.06
  6. Step 6: Final answer
    x = 80,704.07

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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.