Home / 76,741.32-115,111.98-72,409.80

Finding the Fourth Proportional to 76,741.32, 115,111.98 and 72,409.80

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Solution

The fourth proportional to 76,741.32, 115,111.98 and 72,409.80 is: 108,614.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,741.32 : 115,111.98 = 72,409.80 : x
  2. Step 2: Convert to fraction form
    76,741.32/115,111.98 = 72,409.80/x
  3. Step 3: Cross multiply
    76,741.32x = 115,111.98 × 72,409.80
  4. Step 4: Simplify right side
    76,741.32x = 8,335,235,449.40
  5. Step 5: Solve for x
    x = 8,335,235,449.40/76,741.32
  6. Step 6: Final answer
    x = 108,614.70

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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.