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Finding the Fourth Proportional to 66,531.36, 99,758.67 and 45,496.87

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Solution

The fourth proportional to 66,531.36, 99,758.67 and 45,496.87 is: 68,219.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,531.36 : 99,758.67 = 45,496.87 : x
  2. Step 2: Convert to fraction form
    66,531.36/99,758.67 = 45,496.87/x
  3. Step 3: Cross multiply
    66,531.36x = 99,758.67 × 45,496.87
  4. Step 4: Simplify right side
    66,531.36x = 4,538,707,240.36
  5. Step 5: Solve for x
    x = 4,538,707,240.36/66,531.36
  6. Step 6: Final answer
    x = 68,219.07

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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.