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Finding the Fourth Proportional to 74,270.90, 111,515.70 and 57,649.70

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Solution

The fourth proportional to 74,270.90, 111,515.70 and 57,649.70 is: 86,559.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,270.90 : 111,515.70 = 57,649.70 : x
  2. Step 2: Convert to fraction form
    74,270.90/111,515.70 = 57,649.70/x
  3. Step 3: Cross multiply
    74,270.90x = 111,515.70 × 57,649.70
  4. Step 4: Simplify right side
    74,270.90x = 6,428,846,650.29
  5. Step 5: Solve for x
    x = 6,428,846,650.29/74,270.90
  6. Step 6: Final answer
    x = 86,559.43

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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.