Home / 128,257.12-176,994.39-71,668.50

Finding the Fourth Proportional to 128,257.12, 176,994.39 and 71,668.50

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Solution

The fourth proportional to 128,257.12, 176,994.39 and 71,668.50 is: 98,902.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,257.12 : 176,994.39 = 71,668.50 : x
  2. Step 2: Convert to fraction form
    128,257.12/176,994.39 = 71,668.50/x
  3. Step 3: Cross multiply
    128,257.12x = 176,994.39 × 71,668.50
  4. Step 4: Simplify right side
    128,257.12x = 12,684,922,439.72
  5. Step 5: Solve for x
    x = 12,684,922,439.72/128,257.12
  6. Step 6: Final answer
    x = 98,902.29

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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.