Home / 91,966.90-137,768.10-81,007.60

Finding the Fourth Proportional to 91,966.90, 137,768.10 and 81,007.60

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Solution

The fourth proportional to 91,966.90, 137,768.10 and 81,007.60 is: 121,350.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,966.90 : 137,768.10 = 81,007.60 : x
  2. Step 2: Convert to fraction form
    91,966.90/137,768.10 = 81,007.60/x
  3. Step 3: Cross multiply
    91,966.90x = 137,768.10 × 81,007.60
  4. Step 4: Simplify right side
    91,966.90x = 11,160,263,137.56
  5. Step 5: Solve for x
    x = 11,160,263,137.56/91,966.90
  6. Step 6: Final answer
    x = 121,350.87

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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.