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Finding the Fourth Proportional to 173,978,590.31, 260,795,507.03 and 81,697,135.49

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Solution

The fourth proportional to 173,978,590.31, 260,795,507.03 and 81,697,135.49 is: 122,464,757.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    173,978,590.31 : 260,795,507.03 = 81,697,135.49 : x
  2. Step 2: Convert to fraction form
    173,978,590.31/260,795,507.03 = 81,697,135.49/x
  3. Step 3: Cross multiply
    173,978,590.31x = 260,795,507.03 × 81,697,135.49
  4. Step 4: Simplify right side
    173,978,590.31x = 21,306,245,871,300,696
  5. Step 5: Solve for x
    x = 21,306,245,871,300,696/173,978,590.31
  6. Step 6: Final answer
    x = 122,464,757.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.