Home / 100,785.11-139,084.49-57,763.67

Finding the Fourth Proportional to 100,785.11, 139,084.49 and 57,763.67

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Solution

The fourth proportional to 100,785.11, 139,084.49 and 57,763.67 is: 79,714.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,785.11 : 139,084.49 = 57,763.67 : x
  2. Step 2: Convert to fraction form
    100,785.11/139,084.49 = 57,763.67/x
  3. Step 3: Cross multiply
    100,785.11x = 139,084.49 × 57,763.67
  4. Step 4: Simplify right side
    100,785.11x = 8,034,030,553.03
  5. Step 5: Solve for x
    x = 8,034,030,553.03/100,785.11
  6. Step 6: Final answer
    x = 79,714.46

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1.5x scale

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.