Home / 100,828.14-139,140.38-55,505.76

Finding the Fourth Proportional to 100,828.14, 139,140.38 and 55,505.76

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Solution

The fourth proportional to 100,828.14, 139,140.38 and 55,505.76 is: 76,596.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,828.14 : 139,140.38 = 55,505.76 : x
  2. Step 2: Convert to fraction form
    100,828.14/139,140.38 = 55,505.76/x
  3. Step 3: Cross multiply
    100,828.14x = 139,140.38 × 55,505.76
  4. Step 4: Simplify right side
    100,828.14x = 7,723,092,155.58
  5. Step 5: Solve for x
    x = 7,723,092,155.58/100,828.14
  6. Step 6: Final answer
    x = 76,596.59

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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.