Home / 91,816.20-137,529.90-81,966.60

Finding the Fourth Proportional to 91,816.20, 137,529.90 and 81,966.60

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Solution

The fourth proportional to 91,816.20, 137,529.90 and 81,966.60 is: 122,776.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,816.20 : 137,529.90 = 81,966.60 : x
  2. Step 2: Convert to fraction form
    91,816.20/137,529.90 = 81,966.60/x
  3. Step 3: Cross multiply
    91,816.20x = 137,529.90 × 81,966.60
  4. Step 4: Simplify right side
    91,816.20x = 11,272,858,301.34
  5. Step 5: Solve for x
    x = 11,272,858,301.34/91,816.20
  6. Step 6: Final answer
    x = 122,776.35

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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.