Home / 66,431.70-91,684.08-38,136.78

Finding the Fourth Proportional to 66,431.70, 91,684.08 and 38,136.78

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Solution

The fourth proportional to 66,431.70, 91,684.08 and 38,136.78 is: 52,633.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,431.70 : 91,684.08 = 38,136.78 : x
  2. Step 2: Convert to fraction form
    66,431.70/91,684.08 = 38,136.78/x
  3. Step 3: Cross multiply
    66,431.70x = 91,684.08 × 38,136.78
  4. Step 4: Simplify right side
    66,431.70x = 3,496,535,588.46
  5. Step 5: Solve for x
    x = 3,496,535,588.46/66,431.70
  6. Step 6: Final answer
    x = 52,633.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.