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Finding the Fourth Proportional to 128,402.85, 192,637.08 and 49,495.89

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Solution

The fourth proportional to 128,402.85, 192,637.08 and 49,495.89 is: 74,256.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,402.85 : 192,637.08 = 49,495.89 : x
  2. Step 2: Convert to fraction form
    128,402.85/192,637.08 = 49,495.89/x
  3. Step 3: Cross multiply
    128,402.85x = 192,637.08 × 49,495.89
  4. Step 4: Simplify right side
    128,402.85x = 9,534,743,721.60
  5. Step 5: Solve for x
    x = 9,534,743,721.60/128,402.85
  6. Step 6: Final answer
    x = 74,256.48

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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.