Home / 137,020.62-189,087.03-80,421.06

Finding the Fourth Proportional to 137,020.62, 189,087.03 and 80,421.06

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Solution

The fourth proportional to 137,020.62, 189,087.03 and 80,421.06 is: 110,980.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,020.62 : 189,087.03 = 80,421.06 : x
  2. Step 2: Convert to fraction form
    137,020.62/189,087.03 = 80,421.06/x
  3. Step 3: Cross multiply
    137,020.62x = 189,087.03 × 80,421.06
  4. Step 4: Simplify right side
    137,020.62x = 15,206,579,384.85
  5. Step 5: Solve for x
    x = 15,206,579,384.85/137,020.62
  6. Step 6: Final answer
    x = 110,980.23

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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.