Home / 128,936.52-177,932.94-72,348.12

Finding the Fourth Proportional to 128,936.52, 177,932.94 and 72,348.12

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Solution

The fourth proportional to 128,936.52, 177,932.94 and 72,348.12 is: 99,840.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,936.52 : 177,932.94 = 72,348.12 : x
  2. Step 2: Convert to fraction form
    128,936.52/177,932.94 = 72,348.12/x
  3. Step 3: Cross multiply
    128,936.52x = 177,932.94 × 72,348.12
  4. Step 4: Simplify right side
    128,936.52x = 12,873,113,695.07
  5. Step 5: Solve for x
    x = 12,873,113,695.07/128,936.52
  6. Step 6: Final answer
    x = 99,840.71

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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.