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Finding the Fourth Proportional to 136,900.42, 188,917.05 and 76,470.10

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Solution

The fourth proportional to 136,900.42, 188,917.05 and 76,470.10 is: 105,525.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,900.42 : 188,917.05 = 76,470.10 : x
  2. Step 2: Convert to fraction form
    136,900.42/188,917.05 = 76,470.10/x
  3. Step 3: Cross multiply
    136,900.42x = 188,917.05 × 76,470.10
  4. Step 4: Simplify right side
    136,900.42x = 14,446,505,705.21
  5. Step 5: Solve for x
    x = 14,446,505,705.21/136,900.42
  6. Step 6: Final answer
    x = 105,525.65

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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.