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Finding the Fourth Proportional to 99,564.80, 149,373.60 and 43,380.80

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Solution

The fourth proportional to 99,564.80, 149,373.60 and 43,380.80 is: 65,082.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,564.80 : 149,373.60 = 43,380.80 : x
  2. Step 2: Convert to fraction form
    99,564.80/149,373.60 = 43,380.80/x
  3. Step 3: Cross multiply
    99,564.80x = 149,373.60 × 43,380.80
  4. Step 4: Simplify right side
    99,564.80x = 6,479,946,266.88
  5. Step 5: Solve for x
    x = 6,479,946,266.88/99,564.80
  6. Step 6: Final answer
    x = 65,082.70

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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.