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Finding the Fourth Proportional to 78,069, 117,103.30 and 60,325.46

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Solution

The fourth proportional to 78,069, 117,103.30 and 60,325.46 is: 90,488.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,069 : 117,103.30 = 60,325.46 : x
  2. Step 2: Convert to fraction form
    78,069/117,103.30 = 60,325.46/x
  3. Step 3: Cross multiply
    78,069x = 117,103.30 × 60,325.46
  4. Step 4: Simplify right side
    78,069x = 7,064,310,440.02
  5. Step 5: Solve for x
    x = 7,064,310,440.02/78,069
  6. Step 6: Final answer
    x = 90,488.04

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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.