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Finding the Fourth Proportional to 128,038.98, 192,051.21 and 39,292.26

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Solution

The fourth proportional to 128,038.98, 192,051.21 and 39,292.26 is: 58,936.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,038.98 : 192,051.21 = 39,292.26 : x
  2. Step 2: Convert to fraction form
    128,038.98/192,051.21 = 39,292.26/x
  3. Step 3: Cross multiply
    128,038.98x = 192,051.21 × 39,292.26
  4. Step 4: Simplify right side
    128,038.98x = 7,546,126,076.63
  5. Step 5: Solve for x
    x = 7,546,126,076.63/128,038.98
  6. Step 6: Final answer
    x = 58,936.16

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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.