Home / 91,984.20-137,976.30-84,985.80

Finding the Fourth Proportional to 91,984.20, 137,976.30 and 84,985.80

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Solution

The fourth proportional to 91,984.20, 137,976.30 and 84,985.80 is: 127,478.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,984.20 : 137,976.30 = 84,985.80 : x
  2. Step 2: Convert to fraction form
    91,984.20/137,976.30 = 84,985.80/x
  3. Step 3: Cross multiply
    91,984.20x = 137,976.30 × 84,985.80
  4. Step 4: Simplify right side
    91,984.20x = 11,726,026,236.54
  5. Step 5: Solve for x
    x = 11,726,026,236.54/91,984.20
  6. Step 6: Final answer
    x = 127,478.70

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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.