Home / 128,525.31-177,364.89-71,936.69

Finding the Fourth Proportional to 128,525.31, 177,364.89 and 71,936.69

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Solution

The fourth proportional to 128,525.31, 177,364.89 and 71,936.69 is: 99,272.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,525.31 : 177,364.89 = 71,936.69 : x
  2. Step 2: Convert to fraction form
    128,525.31/177,364.89 = 71,936.69/x
  3. Step 3: Cross multiply
    128,525.31x = 177,364.89 × 71,936.69
  4. Step 4: Simplify right side
    128,525.31x = 12,759,042,221.99
  5. Step 5: Solve for x
    x = 12,759,042,221.99/128,525.31
  6. Step 6: Final answer
    x = 99,272.60

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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.