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Finding the Fourth Proportional to 85,998.90, 128,779.65 and 82,062.30

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Solution

The fourth proportional to 85,998.90, 128,779.65 and 82,062.30 is: 122,884.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,998.90 : 128,779.65 = 82,062.30 : x
  2. Step 2: Convert to fraction form
    85,998.90/128,779.65 = 82,062.30/x
  3. Step 3: Cross multiply
    85,998.90x = 128,779.65 × 82,062.30
  4. Step 4: Simplify right side
    85,998.90x = 10,567,954,272.20
  5. Step 5: Solve for x
    x = 10,567,954,272.20/85,998.90
  6. Step 6: Final answer
    x = 122,884.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.