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Finding the Fourth Proportional to 139,969,894.80, 209,954,842.20 and 126,365,005.20

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Solution

The fourth proportional to 139,969,894.80, 209,954,842.20 and 126,365,005.20 is: 189,547,507.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,969,894.80 : 209,954,842.20 = 126,365,005.20 : x
  2. Step 2: Convert to fraction form
    139,969,894.80/209,954,842.20 = 126,365,005.20/x
  3. Step 3: Cross multiply
    139,969,894.80x = 209,954,842.20 × 126,365,005.20
  4. Step 4: Simplify right side
    139,969,894.80x = 26,530,944,726,368,180
  5. Step 5: Solve for x
    x = 26,530,944,726,368,180/139,969,894.80
  6. Step 6: Final answer
    x = 189,547,507.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.