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Finding the Fourth Proportional to 139,294.62, 192,223.53 and 75,631.86

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Solution

The fourth proportional to 139,294.62, 192,223.53 and 75,631.86 is: 104,370.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,294.62 : 192,223.53 = 75,631.86 : x
  2. Step 2: Convert to fraction form
    139,294.62/192,223.53 = 75,631.86/x
  3. Step 3: Cross multiply
    139,294.62x = 192,223.53 × 75,631.86
  4. Step 4: Simplify right side
    139,294.62x = 14,538,223,109.67
  5. Step 5: Solve for x
    x = 14,538,223,109.67/139,294.62
  6. Step 6: Final answer
    x = 104,370.31

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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.