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Finding the Fourth Proportional to 128,410.48, 192,651.15 and 53,565.80

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Solution

The fourth proportional to 128,410.48, 192,651.15 and 53,565.80 is: 80,363.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,410.48 : 192,651.15 = 53,565.80 : x
  2. Step 2: Convert to fraction form
    128,410.48/192,651.15 = 53,565.80/x
  3. Step 3: Cross multiply
    128,410.48x = 192,651.15 × 53,565.80
  4. Step 4: Simplify right side
    128,410.48x = 10,319,512,970.67
  5. Step 5: Solve for x
    x = 10,319,512,970.67/128,410.48
  6. Step 6: Final answer
    x = 80,363.48

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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.