Home / 156,538.20-234,936.90-72,427.80

Finding the Fourth Proportional to 156,538.20, 234,936.90 and 72,427.80

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Solution

The fourth proportional to 156,538.20, 234,936.90 and 72,427.80 is: 108,701.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,538.20 : 234,936.90 = 72,427.80 : x
  2. Step 2: Convert to fraction form
    156,538.20/234,936.90 = 72,427.80/x
  3. Step 3: Cross multiply
    156,538.20x = 234,936.90 × 72,427.80
  4. Step 4: Simplify right side
    156,538.20x = 17,015,962,805.82
  5. Step 5: Solve for x
    x = 17,015,962,805.82/156,538.20
  6. Step 6: Final answer
    x = 108,701.66

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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.