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Finding the Fourth Proportional to 98,859, 136,425.42 and 54,147.96

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Solution

The fourth proportional to 98,859, 136,425.42 and 54,147.96 is: 74,724.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,859 : 136,425.42 = 54,147.96 : x
  2. Step 2: Convert to fraction form
    98,859/136,425.42 = 54,147.96/x
  3. Step 3: Cross multiply
    98,859x = 136,425.42 × 54,147.96
  4. Step 4: Simplify right side
    98,859x = 7,387,158,185.14
  5. Step 5: Solve for x
    x = 7,387,158,185.14/98,859
  6. Step 6: Final answer
    x = 74,724.18

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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.