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Finding the Fourth Proportional to 98,221.77, 135,562.50 and 57,945.54

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Solution

The fourth proportional to 98,221.77, 135,562.50 and 57,945.54 is: 79,974.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,221.77 : 135,562.50 = 57,945.54 : x
  2. Step 2: Convert to fraction form
    98,221.77/135,562.50 = 57,945.54/x
  3. Step 3: Cross multiply
    98,221.77x = 135,562.50 × 57,945.54
  4. Step 4: Simplify right side
    98,221.77x = 7,855,242,266.25
  5. Step 5: Solve for x
    x = 7,855,242,266.25/98,221.77
  6. Step 6: Final answer
    x = 79,974.55

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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.