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Finding the Fourth Proportional to 128,436.51, 192,572.73 and 61,743.93

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Solution

The fourth proportional to 128,436.51, 192,572.73 and 61,743.93 is: 92,576.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,436.51 : 192,572.73 = 61,743.93 : x
  2. Step 2: Convert to fraction form
    128,436.51/192,572.73 = 61,743.93/x
  3. Step 3: Cross multiply
    128,436.51x = 192,572.73 × 61,743.93
  4. Step 4: Simplify right side
    128,436.51x = 11,890,197,161.03
  5. Step 5: Solve for x
    x = 11,890,197,161.03/128,436.51
  6. Step 6: Final answer
    x = 92,576.46

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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.