Home / 128,923.66-177,937.38-81,191.98

Finding the Fourth Proportional to 128,923.66, 177,937.38 and 81,191.98

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Solution

The fourth proportional to 128,923.66, 177,937.38 and 81,191.98 is: 112,059.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,923.66 : 177,937.38 = 81,191.98 : x
  2. Step 2: Convert to fraction form
    128,923.66/177,937.38 = 81,191.98/x
  3. Step 3: Cross multiply
    128,923.66x = 177,937.38 × 81,191.98
  4. Step 4: Simplify right side
    128,923.66x = 14,447,088,198.21
  5. Step 5: Solve for x
    x = 14,447,088,198.21/128,923.66
  6. Step 6: Final answer
    x = 112,059.25

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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.