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Finding the Fourth Proportional to 117,222.76, 161,767.50 and 68,815.21

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Solution

The fourth proportional to 117,222.76, 161,767.50 and 68,815.21 is: 94,965.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,222.76 : 161,767.50 = 68,815.21 : x
  2. Step 2: Convert to fraction form
    117,222.76/161,767.50 = 68,815.21/x
  3. Step 3: Cross multiply
    117,222.76x = 161,767.50 × 68,815.21
  4. Step 4: Simplify right side
    117,222.76x = 11,132,064,483.68
  5. Step 5: Solve for x
    x = 11,132,064,483.68/117,222.76
  6. Step 6: Final answer
    x = 94,965.04

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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.