Home / 191,768.40-287,998.20-139,237.20

Finding the Fourth Proportional to 191,768.40, 287,998.20 and 139,237.20

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Solution

The fourth proportional to 191,768.40, 287,998.20 and 139,237.20 is: 209,106.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,768.40 : 287,998.20 = 139,237.20 : x
  2. Step 2: Convert to fraction form
    191,768.40/287,998.20 = 139,237.20/x
  3. Step 3: Cross multiply
    191,768.40x = 287,998.20 × 139,237.20
  4. Step 4: Simplify right side
    191,768.40x = 40,100,062,973.04
  5. Step 5: Solve for x
    x = 40,100,062,973.04/191,768.40
  6. Step 6: Final answer
    x = 209,106.73

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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.