Home / 91,821.60-137,732.40-77,059.35

Finding the Fourth Proportional to 91,821.60, 137,732.40 and 77,059.35

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Solution

The fourth proportional to 91,821.60, 137,732.40 and 77,059.35 is: 115,589.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,821.60 : 137,732.40 = 77,059.35 : x
  2. Step 2: Convert to fraction form
    91,821.60/137,732.40 = 77,059.35/x
  3. Step 3: Cross multiply
    91,821.60x = 137,732.40 × 77,059.35
  4. Step 4: Simplify right side
    91,821.60x = 10,613,569,217.94
  5. Step 5: Solve for x
    x = 10,613,569,217.94/91,821.60
  6. Step 6: Final answer
    x = 115,589.03

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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.