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Finding the Fourth Proportional to 66,391.95, 91,614.33 and 39,167.46

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Solution

The fourth proportional to 66,391.95, 91,614.33 and 39,167.46 is: 54,047.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,391.95 : 91,614.33 = 39,167.46 : x
  2. Step 2: Convert to fraction form
    66,391.95/91,614.33 = 39,167.46/x
  3. Step 3: Cross multiply
    66,391.95x = 91,614.33 × 39,167.46
  4. Step 4: Simplify right side
    66,391.95x = 3,588,300,605.70
  5. Step 5: Solve for x
    x = 3,588,300,605.70/66,391.95
  6. Step 6: Final answer
    x = 54,047.22

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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.