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Finding the Fourth Proportional to 117,469.50, 162,046.65 and 72,157.69

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Solution

The fourth proportional to 117,469.50, 162,046.65 and 72,157.69 is: 99,539.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,469.50 : 162,046.65 = 72,157.69 : x
  2. Step 2: Convert to fraction form
    117,469.50/162,046.65 = 72,157.69/x
  3. Step 3: Cross multiply
    117,469.50x = 162,046.65 × 72,157.69
  4. Step 4: Simplify right side
    117,469.50x = 11,692,911,936.24
  5. Step 5: Solve for x
    x = 11,692,911,936.24/117,469.50
  6. Step 6: Final answer
    x = 99,539.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.