Home / 123,212.20-170,031.78-66,623.08

Finding the Fourth Proportional to 123,212.20, 170,031.78 and 66,623.08

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Solution

The fourth proportional to 123,212.20, 170,031.78 and 66,623.08 is: 91,939.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,212.20 : 170,031.78 = 66,623.08 : x
  2. Step 2: Convert to fraction form
    123,212.20/170,031.78 = 66,623.08/x
  3. Step 3: Cross multiply
    123,212.20x = 170,031.78 × 66,623.08
  4. Step 4: Simplify right side
    123,212.20x = 11,328,040,881.48
  5. Step 5: Solve for x
    x = 11,328,040,881.48/123,212.20
  6. Step 6: Final answer
    x = 91,939.28

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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.