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Finding the Fourth Proportional to 123,887.78, 170,950.62 and 72,889.29

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Solution

The fourth proportional to 123,887.78, 170,950.62 and 72,889.29 is: 100,578.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,887.78 : 170,950.62 = 72,889.29 : x
  2. Step 2: Convert to fraction form
    123,887.78/170,950.62 = 72,889.29/x
  3. Step 3: Cross multiply
    123,887.78x = 170,950.62 × 72,889.29
  4. Step 4: Simplify right side
    123,887.78x = 12,460,469,590.19
  5. Step 5: Solve for x
    x = 12,460,469,590.19/123,887.78
  6. Step 6: Final answer
    x = 100,578.68

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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.