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Finding the Fourth Proportional to 128,977.80, 193,380.30 and 62,449.80

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Solution

The fourth proportional to 128,977.80, 193,380.30 and 62,449.80 is: 93,632.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,977.80 : 193,380.30 = 62,449.80 : x
  2. Step 2: Convert to fraction form
    128,977.80/193,380.30 = 62,449.80/x
  3. Step 3: Cross multiply
    128,977.80x = 193,380.30 × 62,449.80
  4. Step 4: Simplify right side
    128,977.80x = 12,076,561,058.94
  5. Step 5: Solve for x
    x = 12,076,561,058.94/128,977.80
  6. Step 6: Final answer
    x = 93,632.87

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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.