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Finding the Fourth Proportional to 92,998.74, 128,390.92 and 71,153.94

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Solution

The fourth proportional to 92,998.74, 128,390.92 and 71,153.94 is: 98,232.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,998.74 : 128,390.92 = 71,153.94 : x
  2. Step 2: Convert to fraction form
    92,998.74/128,390.92 = 71,153.94/x
  3. Step 3: Cross multiply
    92,998.74x = 128,390.92 × 71,153.94
  4. Step 4: Simplify right side
    92,998.74x = 9,135,519,818.22
  5. Step 5: Solve for x
    x = 9,135,519,818.22/92,998.74
  6. Step 6: Final answer
    x = 98,232.73

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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.