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Finding the Fourth Proportional to 45,125.40, 67,712.40 and 18,832.80

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Solution

The fourth proportional to 45,125.40, 67,712.40 and 18,832.80 is: 28,259.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,125.40 : 67,712.40 = 18,832.80 : x
  2. Step 2: Convert to fraction form
    45,125.40/67,712.40 = 18,832.80/x
  3. Step 3: Cross multiply
    45,125.40x = 67,712.40 × 18,832.80
  4. Step 4: Simplify right side
    45,125.40x = 1,275,214,086.72
  5. Step 5: Solve for x
    x = 1,275,214,086.72/45,125.40
  6. Step 6: Final answer
    x = 28,259.34

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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.