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Finding the Fourth Proportional to 139,392.20, 192,360.20 and 75,730.52

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Solution

The fourth proportional to 139,392.20, 192,360.20 and 75,730.52 is: 104,507.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,392.20 : 192,360.20 = 75,730.52 : x
  2. Step 2: Convert to fraction form
    139,392.20/192,360.20 = 75,730.52/x
  3. Step 3: Cross multiply
    139,392.20x = 192,360.20 × 75,730.52
  4. Step 4: Simplify right side
    139,392.20x = 14,567,537,973.30
  5. Step 5: Solve for x
    x = 14,567,537,973.30/139,392.20
  6. Step 6: Final answer
    x = 104,507.55

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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.