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Finding the Fourth Proportional to 99,485.37, 149,213.21 and 36,290.66

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Solution

The fourth proportional to 99,485.37, 149,213.21 and 36,290.66 is: 54,430.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,485.37 : 149,213.21 = 36,290.66 : x
  2. Step 2: Convert to fraction form
    99,485.37/149,213.21 = 36,290.66/x
  3. Step 3: Cross multiply
    99,485.37x = 149,213.21 × 36,290.66
  4. Step 4: Simplify right side
    99,485.37x = 5,415,044,944.10
  5. Step 5: Solve for x
    x = 5,415,044,944.10/99,485.37
  6. Step 6: Final answer
    x = 54,430.57

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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.