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Finding the Fourth Proportional to 85,909.56, 128,833.44 and 29,734.42

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Solution

The fourth proportional to 85,909.56, 128,833.44 and 29,734.42 is: 44,590.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,909.56 : 128,833.44 = 29,734.42 : x
  2. Step 2: Convert to fraction form
    85,909.56/128,833.44 = 29,734.42/x
  3. Step 3: Cross multiply
    85,909.56x = 128,833.44 × 29,734.42
  4. Step 4: Simplify right side
    85,909.56x = 3,830,787,615.00
  5. Step 5: Solve for x
    x = 3,830,787,615.00/85,909.56
  6. Step 6: Final answer
    x = 44,590.94

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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.