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Finding the Fourth Proportional to 66,434.56, 99,434.22 and 36,403

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Solution

The fourth proportional to 66,434.56, 99,434.22 and 36,403 is: 54,485.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,434.56 : 99,434.22 = 36,403 : x
  2. Step 2: Convert to fraction form
    66,434.56/99,434.22 = 36,403/x
  3. Step 3: Cross multiply
    66,434.56x = 99,434.22 × 36,403
  4. Step 4: Simplify right side
    66,434.56x = 3,619,703,910.66
  5. Step 5: Solve for x
    x = 3,619,703,910.66/66,434.56
  6. Step 6: Final answer
    x = 54,485.25

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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.