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Finding the Fourth Proportional to 66,862.70, 92,256.88 and 39,626.78

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Solution

The fourth proportional to 66,862.70, 92,256.88 and 39,626.78 is: 54,676.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,862.70 : 92,256.88 = 39,626.78 : x
  2. Step 2: Convert to fraction form
    66,862.70/92,256.88 = 39,626.78/x
  3. Step 3: Cross multiply
    66,862.70x = 92,256.88 × 39,626.78
  4. Step 4: Simplify right side
    66,862.70x = 3,655,843,087.25
  5. Step 5: Solve for x
    x = 3,655,843,087.25/66,862.70
  6. Step 6: Final answer
    x = 54,676.87

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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.