Home / 81,424.20-122,136.30-53,430.60

Finding the Fourth Proportional to 81,424.20, 122,136.30 and 53,430.60

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Solution

The fourth proportional to 81,424.20, 122,136.30 and 53,430.60 is: 80,145.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,424.20 : 122,136.30 = 53,430.60 : x
  2. Step 2: Convert to fraction form
    81,424.20/122,136.30 = 53,430.60/x
  3. Step 3: Cross multiply
    81,424.20x = 122,136.30 × 53,430.60
  4. Step 4: Simplify right side
    81,424.20x = 6,525,815,790.78
  5. Step 5: Solve for x
    x = 6,525,815,790.78/81,424.20
  6. Step 6: Final answer
    x = 80,145.90

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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.