Home / 77,120.16-115,576.56-30,360.48

Finding the Fourth Proportional to 77,120.16, 115,576.56 and 30,360.48

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Solution

The fourth proportional to 77,120.16, 115,576.56 and 30,360.48 is: 45,499.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,120.16 : 115,576.56 = 30,360.48 : x
  2. Step 2: Convert to fraction form
    77,120.16/115,576.56 = 30,360.48/x
  3. Step 3: Cross multiply
    77,120.16x = 115,576.56 × 30,360.48
  4. Step 4: Simplify right side
    77,120.16x = 3,508,959,838.35
  5. Step 5: Solve for x
    x = 3,508,959,838.35/77,120.16
  6. Step 6: Final answer
    x = 45,499.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.