Home / 139,678.57-209,438.79-127,776.43

Finding the Fourth Proportional to 139,678.57, 209,438.79 and 127,776.43

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Solution

The fourth proportional to 139,678.57, 209,438.79 and 127,776.43 is: 191,592.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,678.57 : 209,438.79 = 127,776.43 : x
  2. Step 2: Convert to fraction form
    139,678.57/209,438.79 = 127,776.43/x
  3. Step 3: Cross multiply
    139,678.57x = 209,438.79 × 127,776.43
  4. Step 4: Simplify right side
    139,678.57x = 26,761,340,889.72
  5. Step 5: Solve for x
    x = 26,761,340,889.72/139,678.57
  6. Step 6: Final answer
    x = 191,592.32

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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.