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Finding the Fourth Proportional to 98,846.79, 136,405.60 and 55,828

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Solution

The fourth proportional to 98,846.79, 136,405.60 and 55,828 is: 77,040.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,846.79 : 136,405.60 = 55,828 : x
  2. Step 2: Convert to fraction form
    98,846.79/136,405.60 = 55,828/x
  3. Step 3: Cross multiply
    98,846.79x = 136,405.60 × 55,828
  4. Step 4: Simplify right side
    98,846.79x = 7,615,251,836.80
  5. Step 5: Solve for x
    x = 7,615,251,836.80/98,846.79
  6. Step 6: Final answer
    x = 77,040.96

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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.