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Finding the Fourth Proportional to 98,841, 136,401.06 and 54,129

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Solution

The fourth proportional to 98,841, 136,401.06 and 54,129 is: 74,698.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,841 : 136,401.06 = 54,129 : x
  2. Step 2: Convert to fraction form
    98,841/136,401.06 = 54,129/x
  3. Step 3: Cross multiply
    98,841x = 136,401.06 × 54,129
  4. Step 4: Simplify right side
    98,841x = 7,383,252,976.74
  5. Step 5: Solve for x
    x = 7,383,252,976.74/98,841
  6. Step 6: Final answer
    x = 74,698.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.