Home / 253,931.29-381,072.21-87,719.29

Finding the Fourth Proportional to 253,931.29, 381,072.21 and 87,719.29

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Solution

The fourth proportional to 253,931.29, 381,072.21 and 87,719.29 is: 131,639.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,931.29 : 381,072.21 = 87,719.29 : x
  2. Step 2: Convert to fraction form
    253,931.29/381,072.21 = 87,719.29/x
  3. Step 3: Cross multiply
    253,931.29x = 381,072.21 × 87,719.29
  4. Step 4: Simplify right side
    253,931.29x = 33,427,383,699.93
  5. Step 5: Solve for x
    x = 33,427,383,699.93/253,931.29
  6. Step 6: Final answer
    x = 131,639.48

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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.