Home / 76,719.78-115,145.64-30,005.46

Finding the Fourth Proportional to 76,719.78, 115,145.64 and 30,005.46

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Solution

The fourth proportional to 76,719.78, 115,145.64 and 30,005.46 is: 45,033.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,719.78 : 115,145.64 = 30,005.46 : x
  2. Step 2: Convert to fraction form
    76,719.78/115,145.64 = 30,005.46/x
  3. Step 3: Cross multiply
    76,719.78x = 115,145.64 × 30,005.46
  4. Step 4: Simplify right side
    76,719.78x = 3,454,997,895.19
  5. Step 5: Solve for x
    x = 3,454,997,895.19/76,719.78
  6. Step 6: Final answer
    x = 45,033.99

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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.