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Finding the Fourth Proportional to 121,318,992.90, 181,978,489.35 and 121,318,992.90

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Solution

The fourth proportional to 121,318,992.90, 181,978,489.35 and 121,318,992.90 is: 181,978,489.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,318,992.90 : 181,978,489.35 = 121,318,992.90 : x
  2. Step 2: Convert to fraction form
    121,318,992.90/181,978,489.35 = 121,318,992.90/x
  3. Step 3: Cross multiply
    121,318,992.90x = 181,978,489.35 × 121,318,992.90
  4. Step 4: Simplify right side
    121,318,992.90x = 22,077,447,057,405,376
  5. Step 5: Solve for x
    x = 22,077,447,057,405,376/121,318,992.90
  6. Step 6: Final answer
    x = 181,978,489.35

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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.