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Finding the Fourth Proportional to 91,990.80, 137,986.20 and 45,334.80

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Solution

The fourth proportional to 91,990.80, 137,986.20 and 45,334.80 is: 68,002.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,990.80 : 137,986.20 = 45,334.80 : x
  2. Step 2: Convert to fraction form
    91,990.80/137,986.20 = 45,334.80/x
  3. Step 3: Cross multiply
    91,990.80x = 137,986.20 × 45,334.80
  4. Step 4: Simplify right side
    91,990.80x = 6,255,576,779.76
  5. Step 5: Solve for x
    x = 6,255,576,779.76/91,990.80
  6. Step 6: Final answer
    x = 68,002.20

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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.