Home / 151,986.36-209,770.10-100,212.37

Finding the Fourth Proportional to 151,986.36, 209,770.10 and 100,212.37

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Solution

The fourth proportional to 151,986.36, 209,770.10 and 100,212.37 is: 138,312.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,986.36 : 209,770.10 = 100,212.37 : x
  2. Step 2: Convert to fraction form
    151,986.36/209,770.10 = 100,212.37/x
  3. Step 3: Cross multiply
    151,986.36x = 209,770.10 × 100,212.37
  4. Step 4: Simplify right side
    151,986.36x = 21,021,558,876.14
  5. Step 5: Solve for x
    x = 21,021,558,876.14/151,986.36
  6. Step 6: Final answer
    x = 138,312.14

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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.