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Finding the Fourth Proportional to 78,244.79, 117,367.02 and 28,313.28

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Solution

The fourth proportional to 78,244.79, 117,367.02 and 28,313.28 is: 42,469.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,244.79 : 117,367.02 = 28,313.28 : x
  2. Step 2: Convert to fraction form
    78,244.79/117,367.02 = 28,313.28/x
  3. Step 3: Cross multiply
    78,244.79x = 117,367.02 × 28,313.28
  4. Step 4: Simplify right side
    78,244.79x = 3,323,045,300.03
  5. Step 5: Solve for x
    x = 3,323,045,300.03/78,244.79
  6. Step 6: Final answer
    x = 42,469.86

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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.