Home / 45,420.60-68,130.90-12,145.80

Finding the Fourth Proportional to 45,420.60, 68,130.90 and 12,145.80

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Solution

The fourth proportional to 45,420.60, 68,130.90 and 12,145.80 is: 18,218.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,420.60 : 68,130.90 = 12,145.80 : x
  2. Step 2: Convert to fraction form
    45,420.60/68,130.90 = 12,145.80/x
  3. Step 3: Cross multiply
    45,420.60x = 68,130.90 × 12,145.80
  4. Step 4: Simplify right side
    45,420.60x = 827,504,285.22
  5. Step 5: Solve for x
    x = 827,504,285.22/45,420.60
  6. Step 6: Final answer
    x = 18,218.70

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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.