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Finding the Fourth Proportional to 91,898.73, 126,426.51 and 87,962.13

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Solution

The fourth proportional to 91,898.73, 126,426.51 and 87,962.13 is: 121,010.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,898.73 : 126,426.51 = 87,962.13 : x
  2. Step 2: Convert to fraction form
    91,898.73/126,426.51 = 87,962.13/x
  3. Step 3: Cross multiply
    91,898.73x = 126,426.51 × 87,962.13
  4. Step 4: Simplify right side
    91,898.73x = 11,120,745,108.07
  5. Step 5: Solve for x
    x = 11,120,745,108.07/91,898.73
  6. Step 6: Final answer
    x = 121,010.87

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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.