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Finding the Fourth Proportional to 99,697.80, 149,573.10 and 43,513.80

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Solution

The fourth proportional to 99,697.80, 149,573.10 and 43,513.80 is: 65,282.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,697.80 : 149,573.10 = 43,513.80 : x
  2. Step 2: Convert to fraction form
    99,697.80/149,573.10 = 43,513.80/x
  3. Step 3: Cross multiply
    99,697.80x = 149,573.10 × 43,513.80
  4. Step 4: Simplify right side
    99,697.80x = 6,508,493,958.78
  5. Step 5: Solve for x
    x = 6,508,493,958.78/99,697.80
  6. Step 6: Final answer
    x = 65,282.22

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1.5x scale

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.