Home / 128,951.04-177,958.08-81,186.24

Finding the Fourth Proportional to 128,951.04, 177,958.08 and 81,186.24

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Solution

The fourth proportional to 128,951.04, 177,958.08 and 81,186.24 is: 112,040.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,951.04 : 177,958.08 = 81,186.24 : x
  2. Step 2: Convert to fraction form
    128,951.04/177,958.08 = 81,186.24/x
  3. Step 3: Cross multiply
    128,951.04x = 177,958.08 × 81,186.24
  4. Step 4: Simplify right side
    128,951.04x = 14,447,747,392.82
  5. Step 5: Solve for x
    x = 14,447,747,392.82/128,951.04
  6. Step 6: Final answer
    x = 112,040.57

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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.