Home / 76,979.20-115,468.80-72,313.60

Finding the Fourth Proportional to 76,979.20, 115,468.80 and 72,313.60

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Solution

The fourth proportional to 76,979.20, 115,468.80 and 72,313.60 is: 108,470.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,979.20 : 115,468.80 = 72,313.60 : x
  2. Step 2: Convert to fraction form
    76,979.20/115,468.80 = 72,313.60/x
  3. Step 3: Cross multiply
    76,979.20x = 115,468.80 × 72,313.60
  4. Step 4: Simplify right side
    76,979.20x = 8,349,964,615.68
  5. Step 5: Solve for x
    x = 8,349,964,615.68/76,979.20
  6. Step 6: Final answer
    x = 108,470.40

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1.5x scale

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.