Home / 209,930,804.92-289,762,132.74-121,853,178.56

Finding the Fourth Proportional to 209,930,804.92, 289,762,132.74 and 121,853,178.56

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Solution

The fourth proportional to 209,930,804.92, 289,762,132.74 and 121,853,178.56 is: 168,190,832.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,930,804.92 : 289,762,132.74 = 121,853,178.56 : x
  2. Step 2: Convert to fraction form
    209,930,804.92/289,762,132.74 = 121,853,178.56/x
  3. Step 3: Cross multiply
    209,930,804.92x = 289,762,132.74 × 121,853,178.56
  4. Step 4: Simplify right side
    209,930,804.92x = 35,308,436,900,693,644
  5. Step 5: Solve for x
    x = 35,308,436,900,693,644/209,930,804.92
  6. Step 6: Final answer
    x = 168,190,832.76

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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.