Home / 111,081.45-153,195.51-78,752.19

Finding the Fourth Proportional to 111,081.45, 153,195.51 and 78,752.19

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Solution

The fourth proportional to 111,081.45, 153,195.51 and 78,752.19 is: 108,609.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,081.45 : 153,195.51 = 78,752.19 : x
  2. Step 2: Convert to fraction form
    111,081.45/153,195.51 = 78,752.19/x
  3. Step 3: Cross multiply
    111,081.45x = 153,195.51 × 78,752.19
  4. Step 4: Simplify right side
    111,081.45x = 12,064,481,910.67
  5. Step 5: Solve for x
    x = 12,064,481,910.67/111,081.45
  6. Step 6: Final answer
    x = 108,609.33

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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.