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Finding the Fourth Proportional to 85,885.41, 128,739.93 and 35,994.48

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Solution

The fourth proportional to 85,885.41, 128,739.93 and 35,994.48 is: 53,954.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,885.41 : 128,739.93 = 35,994.48 : x
  2. Step 2: Convert to fraction form
    85,885.41/128,739.93 = 35,994.48/x
  3. Step 3: Cross multiply
    85,885.41x = 128,739.93 × 35,994.48
  4. Step 4: Simplify right side
    85,885.41x = 4,633,926,420.30
  5. Step 5: Solve for x
    x = 4,633,926,420.30/85,885.41
  6. Step 6: Final answer
    x = 53,954.75

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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.