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Finding the Fourth Proportional to 128,505.83, 192,771.66 and 44,254.90

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Solution

The fourth proportional to 128,505.83, 192,771.66 and 44,254.90 is: 66,386.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,505.83 : 192,771.66 = 44,254.90 : x
  2. Step 2: Convert to fraction form
    128,505.83/192,771.66 = 44,254.90/x
  3. Step 3: Cross multiply
    128,505.83x = 192,771.66 × 44,254.90
  4. Step 4: Simplify right side
    128,505.83x = 8,531,090,054.20
  5. Step 5: Solve for x
    x = 8,531,090,054.20/128,505.83
  6. Step 6: Final answer
    x = 66,386.79

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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.