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Finding the Fourth Proportional to 128,558.54, 192,962.20 and 62,045.49

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Solution

The fourth proportional to 128,558.54, 192,962.20 and 62,045.49 is: 93,128.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,558.54 : 192,962.20 = 62,045.49 : x
  2. Step 2: Convert to fraction form
    128,558.54/192,962.20 = 62,045.49/x
  3. Step 3: Cross multiply
    128,558.54x = 192,962.20 × 62,045.49
  4. Step 4: Simplify right side
    128,558.54x = 11,972,434,935.31
  5. Step 5: Solve for x
    x = 11,972,434,935.31/128,558.54
  6. Step 6: Final answer
    x = 93,128.27

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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.