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Finding the Fourth Proportional to 139,364.69, 192,324.28 and 75,702.47

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Solution

The fourth proportional to 139,364.69, 192,324.28 and 75,702.47 is: 104,469.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,364.69 : 192,324.28 = 75,702.47 : x
  2. Step 2: Convert to fraction form
    139,364.69/192,324.28 = 75,702.47/x
  3. Step 3: Cross multiply
    139,364.69x = 192,324.28 × 75,702.47
  4. Step 4: Simplify right side
    139,364.69x = 14,559,423,036.97
  5. Step 5: Solve for x
    x = 14,559,423,036.97/139,364.69
  6. Step 6: Final answer
    x = 104,469.96

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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.