Home / 100,898.81-139,240.40-58,481.95

Finding the Fourth Proportional to 100,898.81, 139,240.40 and 58,481.95

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Solution

The fourth proportional to 100,898.81, 139,240.40 and 58,481.95 is: 80,705.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,898.81 : 139,240.40 = 58,481.95 : x
  2. Step 2: Convert to fraction form
    100,898.81/139,240.40 = 58,481.95/x
  3. Step 3: Cross multiply
    100,898.81x = 139,240.40 × 58,481.95
  4. Step 4: Simplify right side
    100,898.81x = 8,143,049,470.27
  5. Step 5: Solve for x
    x = 8,143,049,470.27/100,898.81
  6. Step 6: Final answer
    x = 80,705.11

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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.