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Finding the Fourth Proportional to 128,475.69, 192,602.79 and 49,645.23

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Solution

The fourth proportional to 128,475.69, 192,602.79 and 49,645.23 is: 74,425.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,475.69 : 192,602.79 = 49,645.23 : x
  2. Step 2: Convert to fraction form
    128,475.69/192,602.79 = 49,645.23/x
  3. Step 3: Cross multiply
    128,475.69x = 192,602.79 × 49,645.23
  4. Step 4: Simplify right side
    128,475.69x = 9,561,809,808.19
  5. Step 5: Solve for x
    x = 9,561,809,808.19/128,475.69
  6. Step 6: Final answer
    x = 74,425.05

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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.