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Finding the Fourth Proportional to 98,998.56, 148,489.20 and 28,893.60

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Solution

The fourth proportional to 98,998.56, 148,489.20 and 28,893.60 is: 43,337.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,998.56 : 148,489.20 = 28,893.60 : x
  2. Step 2: Convert to fraction form
    98,998.56/148,489.20 = 28,893.60/x
  3. Step 3: Cross multiply
    98,998.56x = 148,489.20 × 28,893.60
  4. Step 4: Simplify right side
    98,998.56x = 4,290,387,549.12
  5. Step 5: Solve for x
    x = 4,290,387,549.12/98,998.56
  6. Step 6: Final answer
    x = 43,337.88

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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.