Home / 209,930,780.78-289,762,099.34-121,853,154.32

Finding the Fourth Proportional to 209,930,780.78, 289,762,099.34 and 121,853,154.32

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Solution

The fourth proportional to 209,930,780.78, 289,762,099.34 and 121,853,154.32 is: 168,190,799.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,930,780.78 : 289,762,099.34 = 121,853,154.32 : x
  2. Step 2: Convert to fraction form
    209,930,780.78/289,762,099.34 = 121,853,154.32/x
  3. Step 3: Cross multiply
    209,930,780.78x = 289,762,099.34 × 121,853,154.32
  4. Step 4: Simplify right side
    209,930,780.78x = 35,308,425,806,964,184
  5. Step 5: Solve for x
    x = 35,308,425,806,964,184/209,930,780.78
  6. Step 6: Final answer
    x = 168,190,799.25

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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.