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Finding the Fourth Proportional to 92,811.39, 128,079.81 and 50,369.91

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Solution

The fourth proportional to 92,811.39, 128,079.81 and 50,369.91 is: 69,510.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,811.39 : 128,079.81 = 50,369.91 : x
  2. Step 2: Convert to fraction form
    92,811.39/128,079.81 = 50,369.91/x
  3. Step 3: Cross multiply
    92,811.39x = 128,079.81 × 50,369.91
  4. Step 4: Simplify right side
    92,811.39x = 6,451,368,502.52
  5. Step 5: Solve for x
    x = 6,451,368,502.52/92,811.39
  6. Step 6: Final answer
    x = 69,510.53

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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.