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Finding the Fourth Proportional to 99,487.20, 149,133.60 and 88,989.60

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Solution

The fourth proportional to 99,487.20, 149,133.60 and 88,989.60 is: 133,397.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,487.20 : 149,133.60 = 88,989.60 : x
  2. Step 2: Convert to fraction form
    99,487.20/149,133.60 = 88,989.60/x
  3. Step 3: Cross multiply
    99,487.20x = 149,133.60 × 88,989.60
  4. Step 4: Simplify right side
    99,487.20x = 13,271,339,410.56
  5. Step 5: Solve for x
    x = 13,271,339,410.56/99,487.20
  6. Step 6: Final answer
    x = 133,397.46

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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.