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Finding the Fourth Proportional to 123,366.67, 170,273 and 78,104.99

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Solution

The fourth proportional to 123,366.67, 170,273 and 78,104.99 is: 107,801.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,366.67 : 170,273 = 78,104.99 : x
  2. Step 2: Convert to fraction form
    123,366.67/170,273 = 78,104.99/x
  3. Step 3: Cross multiply
    123,366.67x = 170,273 × 78,104.99
  4. Step 4: Simplify right side
    123,366.67x = 13,299,170,962.27
  5. Step 5: Solve for x
    x = 13,299,170,962.27/123,366.67
  6. Step 6: Final answer
    x = 107,801.98

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1.5x scale

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.