Home / 279,430.86-418,911.18-121,540.40

Finding the Fourth Proportional to 279,430.86, 418,911.18 and 121,540.40

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Solution

The fourth proportional to 279,430.86, 418,911.18 and 121,540.40 is: 182,208.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,430.86 : 418,911.18 = 121,540.40 : x
  2. Step 2: Convert to fraction form
    279,430.86/418,911.18 = 121,540.40/x
  3. Step 3: Cross multiply
    279,430.86x = 418,911.18 × 121,540.40
  4. Step 4: Simplify right side
    279,430.86x = 50,914,630,287.12
  5. Step 5: Solve for x
    x = 50,914,630,287.12/279,430.86
  6. Step 6: Final answer
    x = 182,208.33

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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.