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Finding the Fourth Proportional to 136,879.79, 188,892.14 and 76,451.30

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Solution

The fourth proportional to 136,879.79, 188,892.14 and 76,451.30 is: 105,501.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,879.79 : 188,892.14 = 76,451.30 : x
  2. Step 2: Convert to fraction form
    136,879.79/188,892.14 = 76,451.30/x
  3. Step 3: Cross multiply
    136,879.79x = 188,892.14 × 76,451.30
  4. Step 4: Simplify right side
    136,879.79x = 14,441,048,336.06
  5. Step 5: Solve for x
    x = 14,441,048,336.06/136,879.79
  6. Step 6: Final answer
    x = 105,501.68

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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.