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Finding the Fourth Proportional to 98,740, 136,261.29 and 54,028

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Solution

The fourth proportional to 98,740, 136,261.29 and 54,028 is: 74,558.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,740 : 136,261.29 = 54,028 : x
  2. Step 2: Convert to fraction form
    98,740/136,261.29 = 54,028/x
  3. Step 3: Cross multiply
    98,740x = 136,261.29 × 54,028
  4. Step 4: Simplify right side
    98,740x = 7,361,924,976.12
  5. Step 5: Solve for x
    x = 7,361,924,976.12/98,740
  6. Step 6: Final answer
    x = 74,558.69

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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.