Home / 100,881.14-139,232.61-76,962.65

Finding the Fourth Proportional to 100,881.14, 139,232.61 and 76,962.65

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Solution

The fourth proportional to 100,881.14, 139,232.61 and 76,962.65 is: 106,221.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,881.14 : 139,232.61 = 76,962.65 : x
  2. Step 2: Convert to fraction form
    100,881.14/139,232.61 = 76,962.65/x
  3. Step 3: Cross multiply
    100,881.14x = 139,232.61 × 76,962.65
  4. Step 4: Simplify right side
    100,881.14x = 10,715,709,935.85
  5. Step 5: Solve for x
    x = 10,715,709,935.85/100,881.14
  6. Step 6: Final answer
    x = 106,221.15

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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.