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Finding the Fourth Proportional to 99,439.80, 149,241.30 and 98,662.20

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Solution

The fourth proportional to 99,439.80, 149,241.30 and 98,662.20 is: 148,074.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,439.80 : 149,241.30 = 98,662.20 : x
  2. Step 2: Convert to fraction form
    99,439.80/149,241.30 = 98,662.20/x
  3. Step 3: Cross multiply
    99,439.80x = 149,241.30 × 98,662.20
  4. Step 4: Simplify right side
    99,439.80x = 14,724,474,988.86
  5. Step 5: Solve for x
    x = 14,724,474,988.86/99,439.80
  6. Step 6: Final answer
    x = 148,074.26

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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.