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Finding the Fourth Proportional to 99,496.80, 149,245.20 and 79,813.80

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Solution

The fourth proportional to 99,496.80, 149,245.20 and 79,813.80 is: 119,720.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,496.80 : 149,245.20 = 79,813.80 : x
  2. Step 2: Convert to fraction form
    99,496.80/149,245.20 = 79,813.80/x
  3. Step 3: Cross multiply
    99,496.80x = 149,245.20 × 79,813.80
  4. Step 4: Simplify right side
    99,496.80x = 11,911,826,543.76
  5. Step 5: Solve for x
    x = 11,911,826,543.76/99,496.80
  6. Step 6: Final answer
    x = 119,720.70

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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.