Home / 138,384.99-190,945.96-77,942.72

Finding the Fourth Proportional to 138,384.99, 190,945.96 and 77,942.72

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Solution

The fourth proportional to 138,384.99, 190,945.96 and 77,942.72 is: 107,546.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,384.99 : 190,945.96 = 77,942.72 : x
  2. Step 2: Convert to fraction form
    138,384.99/190,945.96 = 77,942.72/x
  3. Step 3: Cross multiply
    138,384.99x = 190,945.96 × 77,942.72
  4. Step 4: Simplify right side
    138,384.99x = 14,882,847,777.92
  5. Step 5: Solve for x
    x = 14,882,847,777.92/138,384.99
  6. Step 6: Final answer
    x = 107,546.69

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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.