Home / 76,967.20-115,364.40-39,512.80

Finding the Fourth Proportional to 76,967.20, 115,364.40 and 39,512.80

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Solution

The fourth proportional to 76,967.20, 115,364.40 and 39,512.80 is: 59,224.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,967.20 : 115,364.40 = 39,512.80 : x
  2. Step 2: Convert to fraction form
    76,967.20/115,364.40 = 39,512.80/x
  3. Step 3: Cross multiply
    76,967.20x = 115,364.40 × 39,512.80
  4. Step 4: Simplify right side
    76,967.20x = 4,558,370,464.32
  5. Step 5: Solve for x
    x = 4,558,370,464.32/76,967.20
  6. Step 6: Final answer
    x = 59,224.84

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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.