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Finding the Fourth Proportional to 98,008.80, 146,840.40 and 80,383.20

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Solution

The fourth proportional to 98,008.80, 146,840.40 and 80,383.20 is: 120,433.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,008.80 : 146,840.40 = 80,383.20 : x
  2. Step 2: Convert to fraction form
    98,008.80/146,840.40 = 80,383.20/x
  3. Step 3: Cross multiply
    98,008.80x = 146,840.40 × 80,383.20
  4. Step 4: Simplify right side
    98,008.80x = 11,803,501,241.28
  5. Step 5: Solve for x
    x = 11,803,501,241.28/98,008.80
  6. Step 6: Final answer
    x = 120,433.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.