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Finding the Fourth Proportional to 98,218.08, 135,541.08 and 55,776.60

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Solution

The fourth proportional to 98,218.08, 135,541.08 and 55,776.60 is: 76,971.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,218.08 : 135,541.08 = 55,776.60 : x
  2. Step 2: Convert to fraction form
    98,218.08/135,541.08 = 55,776.60/x
  3. Step 3: Cross multiply
    98,218.08x = 135,541.08 × 55,776.60
  4. Step 4: Simplify right side
    98,218.08x = 7,560,020,602.73
  5. Step 5: Solve for x
    x = 7,560,020,602.73/98,218.08
  6. Step 6: Final answer
    x = 76,971.78

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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.