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Finding the Fourth Proportional to 117,379.29, 161,929.62 and 69,615.21

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Solution

The fourth proportional to 117,379.29, 161,929.62 and 69,615.21 is: 96,037.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,379.29 : 161,929.62 = 69,615.21 : x
  2. Step 2: Convert to fraction form
    117,379.29/161,929.62 = 69,615.21/x
  3. Step 3: Cross multiply
    117,379.29x = 161,929.62 × 69,615.21
  4. Step 4: Simplify right side
    117,379.29x = 11,272,764,501.52
  5. Step 5: Solve for x
    x = 11,272,764,501.52/117,379.29
  6. Step 6: Final answer
    x = 96,037.08

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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.