Home / 209,615,400-289,270,398.96-121,561,604.64

Finding the Fourth Proportional to 209,615,400, 289,270,398.96 and 121,561,604.64

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Solution

The fourth proportional to 209,615,400, 289,270,398.96 and 121,561,604.64 is: 167,755,679.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,615,400 : 289,270,398.96 = 121,561,604.64 : x
  2. Step 2: Convert to fraction form
    209,615,400/289,270,398.96 = 121,561,604.64/x
  3. Step 3: Cross multiply
    209,615,400x = 289,270,398.96 × 121,561,604.64
  4. Step 4: Simplify right side
    209,615,400x = 35,164,173,872,430,584
  5. Step 5: Solve for x
    x = 35,164,173,872,430,584/209,615,400
  6. Step 6: Final answer
    x = 167,755,679.56

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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.