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Finding the Fourth Proportional to 117,142.88, 161,650.77 and 68,738.29

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Solution

The fourth proportional to 117,142.88, 161,650.77 and 68,738.29 is: 94,855.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,142.88 : 161,650.77 = 68,738.29 : x
  2. Step 2: Convert to fraction form
    117,142.88/161,650.77 = 68,738.29/x
  3. Step 3: Cross multiply
    117,142.88x = 161,650.77 × 68,738.29
  4. Step 4: Simplify right side
    117,142.88x = 11,111,597,506.98
  5. Step 5: Solve for x
    x = 11,111,597,506.98/117,142.88
  6. Step 6: Final answer
    x = 94,855.08

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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.