Home / 100,990.28-139,367.14-58,573.96

Finding the Fourth Proportional to 100,990.28, 139,367.14 and 58,573.96

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Solution

The fourth proportional to 100,990.28, 139,367.14 and 58,573.96 is: 80,832.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,990.28 : 139,367.14 = 58,573.96 : x
  2. Step 2: Convert to fraction form
    100,990.28/139,367.14 = 58,573.96/x
  3. Step 3: Cross multiply
    100,990.28x = 139,367.14 × 58,573.96
  4. Step 4: Simplify right side
    100,990.28x = 8,163,285,283.67
  5. Step 5: Solve for x
    x = 8,163,285,283.67/100,990.28
  6. Step 6: Final answer
    x = 80,832.39

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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.