Home / 84,741.54-126,503.09-78,589.86

Finding the Fourth Proportional to 84,741.54, 126,503.09 and 78,589.86

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Solution

The fourth proportional to 84,741.54, 126,503.09 and 78,589.86 is: 117,319.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,741.54 : 126,503.09 = 78,589.86 : x
  2. Step 2: Convert to fraction form
    84,741.54/126,503.09 = 78,589.86/x
  3. Step 3: Cross multiply
    84,741.54x = 126,503.09 × 78,589.86
  4. Step 4: Simplify right side
    84,741.54x = 9,941,859,739.72
  5. Step 5: Solve for x
    x = 9,941,859,739.72/84,741.54
  6. Step 6: Final answer
    x = 117,319.79

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.