Home / 100,786.11-139,085.88-57,764.67

Finding the Fourth Proportional to 100,786.11, 139,085.88 and 57,764.67

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Solution

The fourth proportional to 100,786.11, 139,085.88 and 57,764.67 is: 79,715.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,786.11 : 139,085.88 = 57,764.67 : x
  2. Step 2: Convert to fraction form
    100,786.11/139,085.88 = 57,764.67/x
  3. Step 3: Cross multiply
    100,786.11x = 139,085.88 × 57,764.67
  4. Step 4: Simplify right side
    100,786.11x = 8,034,249,671.04
  5. Step 5: Solve for x
    x = 8,034,249,671.04/100,786.11
  6. Step 6: Final answer
    x = 79,715.84

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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.