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Finding the Fourth Proportional to 85,990.96, 128,987.94 and 29,833.06

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Solution

The fourth proportional to 85,990.96, 128,987.94 and 29,833.06 is: 44,750.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,990.96 : 128,987.94 = 29,833.06 : x
  2. Step 2: Convert to fraction form
    85,990.96/128,987.94 = 29,833.06/x
  3. Step 3: Cross multiply
    85,990.96x = 128,987.94 × 29,833.06
  4. Step 4: Simplify right side
    85,990.96x = 3,848,104,953.30
  5. Step 5: Solve for x
    x = 3,848,104,953.30/85,990.96
  6. Step 6: Final answer
    x = 44,750.11

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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.