Home / 219,815.76-303,234.12-139,107.28

Finding the Fourth Proportional to 219,815.76, 303,234.12 and 139,107.28

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Solution

The fourth proportional to 219,815.76, 303,234.12 and 139,107.28 is: 191,897.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,815.76 : 303,234.12 = 139,107.28 : x
  2. Step 2: Convert to fraction form
    219,815.76/303,234.12 = 139,107.28/x
  3. Step 3: Cross multiply
    219,815.76x = 303,234.12 × 139,107.28
  4. Step 4: Simplify right side
    219,815.76x = 42,182,073,636.39
  5. Step 5: Solve for x
    x = 42,182,073,636.39/219,815.76
  6. Step 6: Final answer
    x = 191,897.40

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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.