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Finding the Fourth Proportional to 53,490.40, 80,235.60 and 28,520.80

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Solution

The fourth proportional to 53,490.40, 80,235.60 and 28,520.80 is: 42,781.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,490.40 : 80,235.60 = 28,520.80 : x
  2. Step 2: Convert to fraction form
    53,490.40/80,235.60 = 28,520.80/x
  3. Step 3: Cross multiply
    53,490.40x = 80,235.60 × 28,520.80
  4. Step 4: Simplify right side
    53,490.40x = 2,288,383,500.48
  5. Step 5: Solve for x
    x = 2,288,383,500.48/53,490.40
  6. Step 6: Final answer
    x = 42,781.20

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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.