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Finding the Fourth Proportional to 121,407,221.20, 170,352,747.20 and 121,407,221.20

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Solution

The fourth proportional to 121,407,221.20, 170,352,747.20 and 121,407,221.20 is: 170,352,747.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,407,221.20 : 170,352,747.20 = 121,407,221.20 : x
  2. Step 2: Convert to fraction form
    121,407,221.20/170,352,747.20 = 121,407,221.20/x
  3. Step 3: Cross multiply
    121,407,221.20x = 170,352,747.20 × 121,407,221.20
  4. Step 4: Simplify right side
    121,407,221.20x = 20,682,053,661,338,080
  5. Step 5: Solve for x
    x = 20,682,053,661,338,080/121,407,221.20
  6. Step 6: Final answer
    x = 170,352,747.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.