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Finding the Fourth Proportional to 91,765.97, 137,632.55 and 58,386.88

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Solution

The fourth proportional to 91,765.97, 137,632.55 and 58,386.88 is: 87,569.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,765.97 : 137,632.55 = 58,386.88 : x
  2. Step 2: Convert to fraction form
    91,765.97/137,632.55 = 58,386.88/x
  3. Step 3: Cross multiply
    91,765.97x = 137,632.55 × 58,386.88
  4. Step 4: Simplify right side
    91,765.97x = 8,035,935,180.94
  5. Step 5: Solve for x
    x = 8,035,935,180.94/91,765.97
  6. Step 6: Final answer
    x = 87,569.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.