Home / 137,087.79-189,198.75-76,661.80

Finding the Fourth Proportional to 137,087.79, 189,198.75 and 76,661.80

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Solution

The fourth proportional to 137,087.79, 189,198.75 and 76,661.80 is: 105,803.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,087.79 : 189,198.75 = 76,661.80 : x
  2. Step 2: Convert to fraction form
    137,087.79/189,198.75 = 76,661.80/x
  3. Step 3: Cross multiply
    137,087.79x = 189,198.75 × 76,661.80
  4. Step 4: Simplify right side
    137,087.79x = 14,504,316,732.75
  5. Step 5: Solve for x
    x = 14,504,316,732.75/137,087.79
  6. Step 6: Final answer
    x = 105,803.13

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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.