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Finding the Fourth Proportional to 98,871.78, 136,443.48 and 53,550.30

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Solution

The fourth proportional to 98,871.78, 136,443.48 and 53,550.30 is: 73,899.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,871.78 : 136,443.48 = 53,550.30 : x
  2. Step 2: Convert to fraction form
    98,871.78/136,443.48 = 53,550.30/x
  3. Step 3: Cross multiply
    98,871.78x = 136,443.48 × 53,550.30
  4. Step 4: Simplify right side
    98,871.78x = 7,306,589,287.04
  5. Step 5: Solve for x
    x = 7,306,589,287.04/98,871.78
  6. Step 6: Final answer
    x = 73,899.64

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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.