Home / 100,805.20-139,102.14-58,366.60

Finding the Fourth Proportional to 100,805.20, 139,102.14 and 58,366.60

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Solution

The fourth proportional to 100,805.20, 139,102.14 and 58,366.60 is: 80,540.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,805.20 : 139,102.14 = 58,366.60 : x
  2. Step 2: Convert to fraction form
    100,805.20/139,102.14 = 58,366.60/x
  3. Step 3: Cross multiply
    100,805.20x = 139,102.14 × 58,366.60
  4. Step 4: Simplify right side
    100,805.20x = 8,118,918,964.52
  5. Step 5: Solve for x
    x = 8,118,918,964.52/100,805.20
  6. Step 6: Final answer
    x = 80,540.68

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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.