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Finding the Fourth Proportional to 139,128.84, 208,691.64 and 96,394.86

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Solution

The fourth proportional to 139,128.84, 208,691.64 and 96,394.86 is: 144,591.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,128.84 : 208,691.64 = 96,394.86 : x
  2. Step 2: Convert to fraction form
    139,128.84/208,691.64 = 96,394.86/x
  3. Step 3: Cross multiply
    139,128.84x = 208,691.64 × 96,394.86
  4. Step 4: Simplify right side
    139,128.84x = 20,116,801,420.97
  5. Step 5: Solve for x
    x = 20,116,801,420.97/139,128.84
  6. Step 6: Final answer
    x = 144,591.17

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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.