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Finding the Fourth Proportional to 220,081.07, 303,713.13 and 129,440.85

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Solution

The fourth proportional to 220,081.07, 303,713.13 and 129,440.85 is: 178,629.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,081.07 : 303,713.13 = 129,440.85 : x
  2. Step 2: Convert to fraction form
    220,081.07/303,713.13 = 129,440.85/x
  3. Step 3: Cross multiply
    220,081.07x = 303,713.13 × 129,440.85
  4. Step 4: Simplify right side
    220,081.07x = 39,312,885,703.36
  5. Step 5: Solve for x
    x = 39,312,885,703.36/220,081.07
  6. Step 6: Final answer
    x = 178,629.11

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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.