Home / 128,935.56-177,934.14-72,351.12

Finding the Fourth Proportional to 128,935.56, 177,934.14 and 72,351.12

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Solution

The fourth proportional to 128,935.56, 177,934.14 and 72,351.12 is: 99,846.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,935.56 : 177,934.14 = 72,351.12 : x
  2. Step 2: Convert to fraction form
    128,935.56/177,934.14 = 72,351.12/x
  3. Step 3: Cross multiply
    128,935.56x = 177,934.14 × 72,351.12
  4. Step 4: Simplify right side
    128,935.56x = 12,873,734,315.24
  5. Step 5: Solve for x
    x = 12,873,734,315.24/128,935.56
  6. Step 6: Final answer
    x = 99,846.27

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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.