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Finding the Fourth Proportional to 136,900.13, 188,920.13 and 76,471.65

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Solution

The fourth proportional to 136,900.13, 188,920.13 and 76,471.65 is: 105,529.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,900.13 : 188,920.13 = 76,471.65 : x
  2. Step 2: Convert to fraction form
    136,900.13/188,920.13 = 76,471.65/x
  3. Step 3: Cross multiply
    136,900.13x = 188,920.13 × 76,471.65
  4. Step 4: Simplify right side
    136,900.13x = 14,447,033,676.96
  5. Step 5: Solve for x
    x = 14,447,033,676.96/136,900.13
  6. Step 6: Final answer
    x = 105,529.73

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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.