Home / 154,187.60-212,814.84-100,379.36

Finding the Fourth Proportional to 154,187.60, 212,814.84 and 100,379.36

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Solution

The fourth proportional to 154,187.60, 212,814.84 and 100,379.36 is: 138,546.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,187.60 : 212,814.84 = 100,379.36 : x
  2. Step 2: Convert to fraction form
    154,187.60/212,814.84 = 100,379.36/x
  3. Step 3: Cross multiply
    154,187.60x = 212,814.84 × 100,379.36
  4. Step 4: Simplify right side
    154,187.60x = 21,362,217,437.70
  5. Step 5: Solve for x
    x = 21,362,217,437.70/154,187.60
  6. Step 6: Final answer
    x = 138,546.92

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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.