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Finding the Fourth Proportional to 117,693.39, 176,369.70 and 81,140.86

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Solution

The fourth proportional to 117,693.39, 176,369.70 and 81,140.86 is: 121,593.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,693.39 : 176,369.70 = 81,140.86 : x
  2. Step 2: Convert to fraction form
    117,693.39/176,369.70 = 81,140.86/x
  3. Step 3: Cross multiply
    117,693.39x = 176,369.70 × 81,140.86
  4. Step 4: Simplify right side
    117,693.39x = 14,310,788,668.60
  5. Step 5: Solve for x
    x = 14,310,788,668.60/117,693.39
  6. Step 6: Final answer
    x = 121,593.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.