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Finding the Fourth Proportional to 62,305, 85,980.98 and 39,949

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Solution

The fourth proportional to 62,305, 85,980.98 and 39,949 is: 55,129.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,305 : 85,980.98 = 39,949 : x
  2. Step 2: Convert to fraction form
    62,305/85,980.98 = 39,949/x
  3. Step 3: Cross multiply
    62,305x = 85,980.98 × 39,949
  4. Step 4: Simplify right side
    62,305x = 3,434,854,170.02
  5. Step 5: Solve for x
    x = 3,434,854,170.02/62,305
  6. Step 6: Final answer
    x = 55,129.67

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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.