Home / 91,982.20-137,973.30-77,110.60

Finding the Fourth Proportional to 91,982.20, 137,973.30 and 77,110.60

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Solution

The fourth proportional to 91,982.20, 137,973.30 and 77,110.60 is: 115,665.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,982.20 : 137,973.30 = 77,110.60 : x
  2. Step 2: Convert to fraction form
    91,982.20/137,973.30 = 77,110.60/x
  3. Step 3: Cross multiply
    91,982.20x = 137,973.30 × 77,110.60
  4. Step 4: Simplify right side
    91,982.20x = 10,639,203,946.98
  5. Step 5: Solve for x
    x = 10,639,203,946.98/91,982.20
  6. Step 6: Final answer
    x = 115,665.90

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1.5x scale

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.