Home / 128,923.41-177,937.04-81,191.73

Finding the Fourth Proportional to 128,923.41, 177,937.04 and 81,191.73

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Solution

The fourth proportional to 128,923.41, 177,937.04 and 81,191.73 is: 112,058.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,923.41 : 177,937.04 = 81,191.73 : x
  2. Step 2: Convert to fraction form
    128,923.41/177,937.04 = 81,191.73/x
  3. Step 3: Cross multiply
    128,923.41x = 177,937.04 × 81,191.73
  4. Step 4: Simplify right side
    128,923.41x = 14,447,015,702.72
  5. Step 5: Solve for x
    x = 14,447,015,702.72/128,923.41
  6. Step 6: Final answer
    x = 112,058.90

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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.