Home / 128,760.13-177,694.44-72,171.50

Finding the Fourth Proportional to 128,760.13, 177,694.44 and 72,171.50

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Solution

The fourth proportional to 128,760.13, 177,694.44 and 72,171.50 is: 99,599.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,760.13 : 177,694.44 = 72,171.50 : x
  2. Step 2: Convert to fraction form
    128,760.13/177,694.44 = 72,171.50/x
  3. Step 3: Cross multiply
    128,760.13x = 177,694.44 × 72,171.50
  4. Step 4: Simplify right side
    128,760.13x = 12,824,474,276.46
  5. Step 5: Solve for x
    x = 12,824,474,276.46/128,760.13
  6. Step 6: Final answer
    x = 99,599.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.