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Finding the Fourth Proportional to 98,201.78, 135,518.49 and 53,489.78

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Solution

The fourth proportional to 98,201.78, 135,518.49 and 53,489.78 is: 73,815.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,201.78 : 135,518.49 = 53,489.78 : x
  2. Step 2: Convert to fraction form
    98,201.78/135,518.49 = 53,489.78/x
  3. Step 3: Cross multiply
    98,201.78x = 135,518.49 × 53,489.78
  4. Step 4: Simplify right side
    98,201.78x = 7,248,854,216.03
  5. Step 5: Solve for x
    x = 7,248,854,216.03/98,201.78
  6. Step 6: Final answer
    x = 73,815.91

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1.5x scale

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.