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Finding the Fourth Proportional to 74,394, 111,561.84 and 30,012.48

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Solution

The fourth proportional to 74,394, 111,561.84 and 30,012.48 is: 45,006.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,394 : 111,561.84 = 30,012.48 : x
  2. Step 2: Convert to fraction form
    74,394/111,561.84 = 30,012.48/x
  3. Step 3: Cross multiply
    74,394x = 111,561.84 × 30,012.48
  4. Step 4: Simplify right side
    74,394x = 3,348,247,491.76
  5. Step 5: Solve for x
    x = 3,348,247,491.76/74,394
  6. Step 6: Final answer
    x = 45,006.96

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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.