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Finding the Fourth Proportional to 128,520.80, 192,651.60 and 58,450.40

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Solution

The fourth proportional to 128,520.80, 192,651.60 and 58,450.40 is: 87,616.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,520.80 : 192,651.60 = 58,450.40 : x
  2. Step 2: Convert to fraction form
    128,520.80/192,651.60 = 58,450.40/x
  3. Step 3: Cross multiply
    128,520.80x = 192,651.60 × 58,450.40
  4. Step 4: Simplify right side
    128,520.80x = 11,260,563,080.64
  5. Step 5: Solve for x
    x = 11,260,563,080.64/128,520.80
  6. Step 6: Final answer
    x = 87,616.66

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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.