Home / 123,186.20-170,023.36-77,835.40

Finding the Fourth Proportional to 123,186.20, 170,023.36 and 77,835.40

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Solution

The fourth proportional to 123,186.20, 170,023.36 and 77,835.40 is: 107,429.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,186.20 : 170,023.36 = 77,835.40 : x
  2. Step 2: Convert to fraction form
    123,186.20/170,023.36 = 77,835.40/x
  3. Step 3: Cross multiply
    123,186.20x = 170,023.36 × 77,835.40
  4. Step 4: Simplify right side
    123,186.20x = 13,233,836,234.94
  5. Step 5: Solve for x
    x = 13,233,836,234.94/123,186.20
  6. Step 6: Final answer
    x = 107,429.54

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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.