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Finding the Fourth Proportional to 78,340.88, 117,491.22 and 30,299.78

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Solution

The fourth proportional to 78,340.88, 117,491.22 and 30,299.78 is: 45,441.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,340.88 : 117,491.22 = 30,299.78 : x
  2. Step 2: Convert to fraction form
    78,340.88/117,491.22 = 30,299.78/x
  3. Step 3: Cross multiply
    78,340.88x = 117,491.22 × 30,299.78
  4. Step 4: Simplify right side
    78,340.88x = 3,559,957,530.48
  5. Step 5: Solve for x
    x = 3,559,957,530.48/78,340.88
  6. Step 6: Final answer
    x = 45,441.89

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1.5x scale

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.