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Finding the Fourth Proportional to 85,609.80, 117,896.58 and 61,698.60

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Solution

The fourth proportional to 85,609.80, 117,896.58 and 61,698.60 is: 84,967.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,609.80 : 117,896.58 = 61,698.60 : x
  2. Step 2: Convert to fraction form
    85,609.80/117,896.58 = 61,698.60/x
  3. Step 3: Cross multiply
    85,609.80x = 117,896.58 × 61,698.60
  4. Step 4: Simplify right side
    85,609.80x = 7,274,053,930.79
  5. Step 5: Solve for x
    x = 7,274,053,930.79/85,609.80
  6. Step 6: Final answer
    x = 84,967.54

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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.