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Finding the Fourth Proportional to 91,474.80, 137,212.20 and 69,021.60

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Solution

The fourth proportional to 91,474.80, 137,212.20 and 69,021.60 is: 103,532.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,474.80 : 137,212.20 = 69,021.60 : x
  2. Step 2: Convert to fraction form
    91,474.80/137,212.20 = 69,021.60/x
  3. Step 3: Cross multiply
    91,474.80x = 137,212.20 × 69,021.60
  4. Step 4: Simplify right side
    91,474.80x = 9,470,605,583.52
  5. Step 5: Solve for x
    x = 9,470,605,583.52/91,474.80
  6. Step 6: Final answer
    x = 103,532.40

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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.