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Finding the Fourth Proportional to 99,586.80, 149,380.20 and 91,983.60

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Solution

The fourth proportional to 99,586.80, 149,380.20 and 91,983.60 is: 137,975.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,586.80 : 149,380.20 = 91,983.60 : x
  2. Step 2: Convert to fraction form
    99,586.80/149,380.20 = 91,983.60/x
  3. Step 3: Cross multiply
    99,586.80x = 149,380.20 × 91,983.60
  4. Step 4: Simplify right side
    99,586.80x = 13,740,528,564.72
  5. Step 5: Solve for x
    x = 13,740,528,564.72/99,586.80
  6. Step 6: Final answer
    x = 137,975.40

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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.