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Finding the Fourth Proportional to 57,912.02, 86,911.71 and 42,369.74

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Solution

The fourth proportional to 57,912.02, 86,911.71 and 42,369.74 is: 63,586.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,912.02 : 86,911.71 = 42,369.74 : x
  2. Step 2: Convert to fraction form
    57,912.02/86,911.71 = 42,369.74/x
  3. Step 3: Cross multiply
    57,912.02x = 86,911.71 × 42,369.74
  4. Step 4: Simplify right side
    57,912.02x = 3,682,426,555.66
  5. Step 5: Solve for x
    x = 3,682,426,555.66/57,912.02
  6. Step 6: Final answer
    x = 63,586.57

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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.