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Finding the Fourth Proportional to 128,379.51, 192,569.10 and 49,438.38

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Solution

The fourth proportional to 128,379.51, 192,569.10 and 49,438.38 is: 74,157.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,379.51 : 192,569.10 = 49,438.38 : x
  2. Step 2: Convert to fraction form
    128,379.51/192,569.10 = 49,438.38/x
  3. Step 3: Cross multiply
    128,379.51x = 192,569.10 × 49,438.38
  4. Step 4: Simplify right side
    128,379.51x = 9,520,304,342.06
  5. Step 5: Solve for x
    x = 9,520,304,342.06/128,379.51
  6. Step 6: Final answer
    x = 74,157.51

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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.