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Finding the Fourth Proportional to 117,158.72, 161,672.64 and 69,416.48

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Solution

The fourth proportional to 117,158.72, 161,672.64 and 69,416.48 is: 95,790.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,158.72 : 161,672.64 = 69,416.48 : x
  2. Step 2: Convert to fraction form
    117,158.72/161,672.64 = 69,416.48/x
  3. Step 3: Cross multiply
    117,158.72x = 161,672.64 × 69,416.48
  4. Step 4: Simplify right side
    117,158.72x = 11,222,745,581.11
  5. Step 5: Solve for x
    x = 11,222,745,581.11/117,158.72
  6. Step 6: Final answer
    x = 95,790.95

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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.