Home / 85,906.90-128,829.45-29,731.75

Finding the Fourth Proportional to 85,906.90, 128,829.45 and 29,731.75

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Solution

The fourth proportional to 85,906.90, 128,829.45 and 29,731.75 is: 44,586.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,906.90 : 128,829.45 = 29,731.75 : x
  2. Step 2: Convert to fraction form
    85,906.90/128,829.45 = 29,731.75/x
  3. Step 3: Cross multiply
    85,906.90x = 128,829.45 × 29,731.75
  4. Step 4: Simplify right side
    85,906.90x = 3,830,325,000.04
  5. Step 5: Solve for x
    x = 3,830,325,000.04/85,906.90
  6. Step 6: Final answer
    x = 44,586.93

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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.