Home / 128,424.94-177,227.06-71,836.31

Finding the Fourth Proportional to 128,424.94, 177,227.06 and 71,836.31

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Solution

The fourth proportional to 128,424.94, 177,227.06 and 71,836.31 is: 99,134.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,424.94 : 177,227.06 = 71,836.31 : x
  2. Step 2: Convert to fraction form
    128,424.94/177,227.06 = 71,836.31/x
  3. Step 3: Cross multiply
    128,424.94x = 177,227.06 × 71,836.31
  4. Step 4: Simplify right side
    128,424.94x = 12,731,338,106.43
  5. Step 5: Solve for x
    x = 12,731,338,106.43/128,424.94
  6. Step 6: Final answer
    x = 99,134.47

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1.5x scale

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.