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Finding the Fourth Proportional to 57,990.36, 86,971.90 and 32,700.74

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Solution

The fourth proportional to 57,990.36, 86,971.90 and 32,700.74 is: 49,043.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,990.36 : 86,971.90 = 32,700.74 : x
  2. Step 2: Convert to fraction form
    57,990.36/86,971.90 = 32,700.74/x
  3. Step 3: Cross multiply
    57,990.36x = 86,971.90 × 32,700.74
  4. Step 4: Simplify right side
    57,990.36x = 2,844,045,370.49
  5. Step 5: Solve for x
    x = 2,844,045,370.49/57,990.36
  6. Step 6: Final answer
    x = 49,043.42

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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.