Home / 137,172.07-189,293.11-76,743.78

Finding the Fourth Proportional to 137,172.07, 189,293.11 and 76,743.78

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Solution

The fourth proportional to 137,172.07, 189,293.11 and 76,743.78 is: 105,903.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,172.07 : 189,293.11 = 76,743.78 : x
  2. Step 2: Convert to fraction form
    137,172.07/189,293.11 = 76,743.78/x
  3. Step 3: Cross multiply
    137,172.07x = 189,293.11 × 76,743.78
  4. Step 4: Simplify right side
    137,172.07x = 14,527,068,789.36
  5. Step 5: Solve for x
    x = 14,527,068,789.36/137,172.07
  6. Step 6: Final answer
    x = 105,903.98

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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.