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Finding the Fourth Proportional to 61,675.10, 85,112 and 33,380.78

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Solution

The fourth proportional to 61,675.10, 85,112 and 33,380.78 is: 46,065.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,675.10 : 85,112 = 33,380.78 : x
  2. Step 2: Convert to fraction form
    61,675.10/85,112 = 33,380.78/x
  3. Step 3: Cross multiply
    61,675.10x = 85,112 × 33,380.78
  4. Step 4: Simplify right side
    61,675.10x = 2,841,104,947.36
  5. Step 5: Solve for x
    x = 2,841,104,947.36/61,675.10
  6. Step 6: Final answer
    x = 46,065.67

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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.