Home / 209,930,788.74-289,762,110.30-121,853,162.28

Finding the Fourth Proportional to 209,930,788.74, 289,762,110.30 and 121,853,162.28

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Solution

The fourth proportional to 209,930,788.74, 289,762,110.30 and 121,853,162.28 is: 168,190,810.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,930,788.74 : 289,762,110.30 = 121,853,162.28 : x
  2. Step 2: Convert to fraction form
    209,930,788.74/289,762,110.30 = 121,853,162.28/x
  3. Step 3: Cross multiply
    209,930,788.74x = 289,762,110.30 × 121,853,162.28
  4. Step 4: Simplify right side
    209,930,788.74x = 35,308,429,448,981,160
  5. Step 5: Solve for x
    x = 35,308,429,448,981,160/209,930,788.74
  6. Step 6: Final answer
    x = 168,190,810.22

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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.