Home / 91,890.20-137,835.30-91,112.60

Finding the Fourth Proportional to 91,890.20, 137,835.30 and 91,112.60

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Solution

The fourth proportional to 91,890.20, 137,835.30 and 91,112.60 is: 136,668.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,890.20 : 137,835.30 = 91,112.60 : x
  2. Step 2: Convert to fraction form
    91,890.20/137,835.30 = 91,112.60/x
  3. Step 3: Cross multiply
    91,890.20x = 137,835.30 × 91,112.60
  4. Step 4: Simplify right side
    91,890.20x = 12,558,532,554.78
  5. Step 5: Solve for x
    x = 12,558,532,554.78/91,890.20
  6. Step 6: Final answer
    x = 136,668.90

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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.