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Finding the Fourth Proportional to 62,213.50, 85,854.64 and 39,857.50

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Solution

The fourth proportional to 62,213.50, 85,854.64 and 39,857.50 is: 55,003.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,213.50 : 85,854.64 = 39,857.50 : x
  2. Step 2: Convert to fraction form
    62,213.50/85,854.64 = 39,857.50/x
  3. Step 3: Cross multiply
    62,213.50x = 85,854.64 × 39,857.50
  4. Step 4: Simplify right side
    62,213.50x = 3,421,951,313.80
  5. Step 5: Solve for x
    x = 3,421,951,313.80/62,213.50
  6. Step 6: Final answer
    x = 55,003.36

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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.