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Finding the Fourth Proportional to 117,960, 162,781.52 and 64,243.84

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Solution

The fourth proportional to 117,960, 162,781.52 and 64,243.84 is: 88,654.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,960 : 162,781.52 = 64,243.84 : x
  2. Step 2: Convert to fraction form
    117,960/162,781.52 = 64,243.84/x
  3. Step 3: Cross multiply
    117,960x = 162,781.52 × 64,243.84
  4. Step 4: Simplify right side
    117,960x = 10,457,709,925.84
  5. Step 5: Solve for x
    x = 10,457,709,925.84/117,960
  6. Step 6: Final answer
    x = 88,654.71

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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.