Home / 76,935.40-115,403.10-72,634.60

Finding the Fourth Proportional to 76,935.40, 115,403.10 and 72,634.60

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Solution

The fourth proportional to 76,935.40, 115,403.10 and 72,634.60 is: 108,951.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,935.40 : 115,403.10 = 72,634.60 : x
  2. Step 2: Convert to fraction form
    76,935.40/115,403.10 = 72,634.60/x
  3. Step 3: Cross multiply
    76,935.40x = 115,403.10 × 72,634.60
  4. Step 4: Simplify right side
    76,935.40x = 8,382,258,007.26
  5. Step 5: Solve for x
    x = 8,382,258,007.26/76,935.40
  6. Step 6: Final answer
    x = 108,951.90

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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.