Home / 128,935.11-177,927.65-71,571.11

Finding the Fourth Proportional to 128,935.11, 177,927.65 and 71,571.11

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Solution

The fourth proportional to 128,935.11, 177,927.65 and 71,571.11 is: 98,766.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,935.11 : 177,927.65 = 71,571.11 : x
  2. Step 2: Convert to fraction form
    128,935.11/177,927.65 = 71,571.11/x
  3. Step 3: Cross multiply
    128,935.11x = 177,927.65 × 71,571.11
  4. Step 4: Simplify right side
    128,935.11x = 12,734,479,052.34
  5. Step 5: Solve for x
    x = 12,734,479,052.34/128,935.11
  6. Step 6: Final answer
    x = 98,766.58

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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.