Home / 117,869.74-162,732.91-81,138.67

Finding the Fourth Proportional to 117,869.74, 162,732.91 and 81,138.67

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Solution

The fourth proportional to 117,869.74, 162,732.91 and 81,138.67 is: 112,021.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,869.74 : 162,732.91 = 81,138.67 : x
  2. Step 2: Convert to fraction form
    117,869.74/162,732.91 = 81,138.67/x
  3. Step 3: Cross multiply
    117,869.74x = 162,732.91 × 81,138.67
  4. Step 4: Simplify right side
    117,869.74x = 13,203,931,882.63
  5. Step 5: Solve for x
    x = 13,203,931,882.63/117,869.74
  6. Step 6: Final answer
    x = 112,021.39

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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.