Home / 154,354.34-212,945.94-100,619.78

Finding the Fourth Proportional to 154,354.34, 212,945.94 and 100,619.78

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Solution

The fourth proportional to 154,354.34, 212,945.94 and 100,619.78 is: 138,814.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,354.34 : 212,945.94 = 100,619.78 : x
  2. Step 2: Convert to fraction form
    154,354.34/212,945.94 = 100,619.78/x
  3. Step 3: Cross multiply
    154,354.34x = 212,945.94 × 100,619.78
  4. Step 4: Simplify right side
    154,354.34x = 21,426,573,634.69
  5. Step 5: Solve for x
    x = 21,426,573,634.69/154,354.34
  6. Step 6: Final answer
    x = 138,814.20

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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.